| + | 
              
              B3GNT3 | up-regulates activity   
              glycosylation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-275389 | 
									Asn192 | 
									KREEKLFNVTSTLRI | 
									Homo sapiens | 
									BT-549 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29438695 | 
								
									These results further suggested that B3GNT3 mediates PD-L1 and PD-1 interaction through N-linked glycosylation instead of O-linked glycosylation | 
								 
						 
                     | 
              
               
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-275390 | 
									Asn200 | 
									VTSTLRINTTTNEIF | 
									Homo sapiens | 
									BT-549 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29438695 | 
								
									These results further suggested that B3GNT3 mediates PD-L1 and PD-1 interaction through N-linked glycosylation instead of O-linked glycosylation | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					2 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              GSK3B | down-regulates quantity by destabilization   
              phosphorylation
               | 
              CD274 | 
              
              0.306 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277275 | 
									Ser184 | 
									GKTTTTNsKREEKLF | 
									Homo sapiens | 
									BT-549 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27572267 | 
								
									We show that glycogen synthase kinase 3β (GSK3β) interacts with PD-L1 and induces phosphorylation-dependent proteasome degradation of PD-L1 by β-TrCP. | 
								 
						 
                     | 
              
               
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277276 | 
									Thr180 | 
									QVLSGKTtTTNSKRE | 
									Homo sapiens | 
									BT-549 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27572267 | 
								
									We show that glycogen synthase kinase 3β (GSK3β) interacts with PD-L1 and induces phosphorylation-dependent proteasome degradation of PD-L1 by β-TrCP. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					2 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              GSK3A | down-regulates quantity by destabilization   
              phosphorylation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277552 | 
									Ser279 | 
									CGIQDTNsKKQSDTH | 
									Homo sapiens | 
									HEK-293T Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 33879767 | 
								
									We find EGFR inhibitors promote PD-L1 ubiquitination and proteasomal degradation following GSK3α-mediated phosphorylation of Ser279/Ser283. We identify ARIH1 as the E3 ubiquitin ligase responsible for targeting PD-L1 to degradation. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              NEK2 | up-regulates quantity by stabilization   
              phosphorylation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277315 | 
									Thr194 | 
									EEKLFNVtSTLRINT | 
									Mus musculus | 
									Pancreatic Cancer Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 34315872 | 
								
									NEK2 interacts with PD-L1, phosphorylating the T194/T210 residues and preventing ubiquitin-proteasome pathway-mediated degradation of PD-L1 in ER lumen.  | 
								 
						 
                     | 
              
               
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277314 | 
									Thr210 | 
									TNEIFYCtFRRLDPE | 
									Mus musculus | 
									Pancreatic Cancer Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 34315872 | 
								
									NEK2 interacts with PD-L1, phosphorylating the T194/T210 residues and preventing ubiquitin-proteasome pathway-mediated degradation of PD-L1 in ER lumen.  | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					2 | 
					Organism: | 
							Mus Musculus | 
				
              | + | 
              
              COPS5 | up-regulates quantity by stabilization   
              deubiquitination
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274977 | 
									 | 
									 | 
									Homo sapiens | 
									HEK-293 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27866850 | 
								
									The results suggested that TNF-α upregulates expression of CSN5, which interacts and deubiquitinates PD-L1 for protein stabilization. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              FOXP3 | up-regulates quantity by expression   
              transcriptional regulation
               | 
              CD274 | 
              
              0.471 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277728 | 
									 | 
									 | 
									Homo sapiens | 
									Pancreatic Cancer Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 38339310 | 
								
									FOXP3 expression additionally increased programmed death ligand 1 (PD-L1) expression, which, when inhibited with CCL5, decreased the tumor burden and Treg infiltration in orthotopic murine, Pan-02 PDAC tumors  | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              ITCH | down-regulates quantity by destabilization   
              ubiquitination
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-278815 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 35638972 | 
								
									ITCH Ubiquitinates and Down-Regulates Tumor-Surface PD-L1.|The current study supports a model (Fig. 7) in which the E3 ligase ITCH mediates poly-ubiquitination of PD-L1 and down-regulates tumor cell-surface PD-L1 levels (via ubiquitin-directed lysosomal degradation) in MAPKi-adapted melanoma cells and in potentially other biologic contexts such quasi-mesenchymal tumor cell-states that contribute to therapy resistance and metastatic potential. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              ARIH1 | down-regulates quantity by destabilization   
              ubiquitination, polyubiquitination
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-278582 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 33879767 | 
								
									E3 ubiquitin ligase ARIH1 directly ubiquitinates PD-L1 and targets it for proteasomal degradation, following EGFR inhibition. | 
								 
						 
                     | 
              
               
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277553 | 
									 | 
									 | 
									Homo sapiens | 
									HEK-293T Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 33879767 | 
								
									We find EGFR inhibitors promote PD-L1 ubiquitination and proteasomal degradation following GSK3α-mediated phosphorylation of Ser279/Ser283. We identify ARIH1 as the E3 ubiquitin ligase responsible for targeting PD-L1 to degradation. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					2 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              STUB1 | down-regulates quantity by destabilization   
              destabilization
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274979 | 
									 | 
									 | 
									Homo sapiens | 
									A-375 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 28813410 | 
								
									Deletion of STUB1 resulted in a more profound increase in PD-L1 levels in CMTM6 deficient than in CMTM6 proficient cells, identifying STUB1 as an E3 ligase that causes destabilization of PD-L1 (Fig. 4f,g), either by direct modification of one of the lysines in the PD-L1 cytoplasmic domain or indirectly | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              SPOP | down-regulates quantity   
              ubiquitination
               | 
              CD274 | 
              
              0.327 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274978 | 
									 | 
									 | 
									Homo sapiens | 
									LNCaP-C4-2 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29160310 | 
								
									Loss-of-function mutations in SPOP compromise ubiquitination-mediated PD-L1 degradation, leading to increased PD-L1 levels and reduced numbers of tumor-infiltrating lymphocytes (TILs) in mouse tumors and in primary human prostate cancer specimens. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              CD274 | up-regulates   
              binding
               | 
              PDCD1 | 
              
              0.936 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-82604 | 
									 | 
									 | 
									Homo sapiens | 
									T-lymphocyte | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 11015443 | 
								
									Pd-l1, was found to bind pd-1 specifically. The functional significance of this interaction has been demonstrated in t cell assays, in which engagement of pd-1 by pd-l1 leads to the inhibition of tcr-mediated lymphocyte proliferation and cytokine secretion. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              STT3B | up-regulates quantity by stabilization   
              glycosylation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274976 | 
									 | 
									 | 
									Homo sapiens | 
									MCF-10A Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29765039 | 
								
									Together, these results support a notion that the two STT3 isoforms regulate EMT-mediated PD-L1 induction through PD-L1 protein N-glycosylation and stabilization. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              SCF-betaTRCP | down-regulates quantity by destabilization   
              polyubiquitination
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-277277 | 
									 | 
									 | 
									Homo sapiens | 
									BT-549 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27572267 | 
								
									We show that glycogen synthase kinase 3β (GSK3β) interacts with PD-L1 and induces phosphorylation-dependent proteasome degradation of PD-L1 by β-TrCP. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              SIGMAR1 | up-regulates quantity by stabilization   
              stabilization
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274974 | 
									 | 
									 | 
									Homo sapiens | 
									MDA-MB-231 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29117944 | 
								
									We propose that Sigma1 is a ligand-operated scaffolding protein that promotes the stability, processing, assembly, and trafficking of specific proteins in the secretory pathway of cancer cells. In support of this hypothesis, we found that siRNA-mediated knockdown of Sigma1 resulted in a significant decrease in PD-L1 protein levels in triple-negative MDA-MB-231 breast cancer and androgen-independent PC3 prostate cancer cells | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              KMT2C | up-regulates quantity by expression   
              transcriptional regulation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-260040 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 30385408 | 
								
									MLL3 enhances the transcription of PD-L1 and regulates anti-tumor immunity. We found that MLL3 bound to the enhancer of PD-L1. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              GSK3B | down-regulates quantity   
              phosphorylation
               | 
              CD274 | 
              
              0.306 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-279047 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27572267 | 
								
									Together, the results suggest that GSK3\u03b2 binds and phosphorylates the non-glycosylated PD-L1.|We show that glycogen synthase kinase 3\u03b2 (GSK3\u03b2) interacts with PD-L1 and induces phosphorylation-dependent proteasome degradation of PD-L1 by \u03b2-TrCP. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              CMTM4 | up-regulates quantity by stabilization   
              stabilization
               | 
              CD274 | 
              
              0.353 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274981 | 
									 | 
									 | 
									Homo sapiens | 
									A-375 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 28813410 | 
								
									Furthermore, the observations that (i) CMTM6 affects PD-L1 protein stability at late time points after biosynthesis; (ii) CMTM6, CMTM4 and PD-L1 interact, as shown by co-immunoprecipitation; and that (iii) CMTM6 is largely located at the cell surface, collectively suggest a model in which CMTM6 interacts with PD-L1 at the tumour cell surface and thereby protects it from degradation | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              CMTM6 | up-regulates quantity by stabilization   
              stabilization
               | 
              CD274 | 
              
              0.472 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274980 | 
									 | 
									 | 
									Homo sapiens | 
									A-375 Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 28813410 | 
								
									Furthermore, the observations that (i) CMTM6 affects PD-L1 protein stability at late time points after biosynthesis; (ii) CMTM6, CMTM4 and PD-L1 interact, as shown by co-immunoprecipitation; and that (iii) CMTM6 is largely located at the cell surface, collectively suggest a model in which CMTM6 interacts with PD-L1 at the tumour cell surface and thereby protects it from degradation | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              STT3A | up-regulates quantity by stabilization   
              glycosylation
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274975 | 
									 | 
									 | 
									Homo sapiens | 
									MCF-10A Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 29765039 | 
								
									Together, these results support a notion that the two STT3 isoforms regulate EMT-mediated PD-L1 induction through PD-L1 protein N-glycosylation and stabilization. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              FKBP5 | up-regulates quantity by expression   
              catalytic activity
               | 
              CD274 | 
              
              0.2 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-274973 | 
									 | 
									 | 
									Homo sapiens | 
									U-251MG Cell | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 28978117 | 
								
									FKBP51s upregulated PD-L1 expression on the plasma membrane by catalysing the protein folding required for subsequent glycosylation. Inhibition of FKBP51s isomerase activity by SAFit decreased PD-L1 levels | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              HIF1A | up-regulates quantity by expression   
              transcriptional regulation
               | 
              CD274 | 
              
              0.282 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-259092 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27141364 | 
								
									STAT3 and HIF-1α cooperatively enhance PD-L1 expression in EML4-ALK-translocated pADC cells under hypoxia. Taken together, these findings suggest that EML4-ALK might increase HIF-1α expression under hypoxia by enhancing transcription and inhibiting ubiquitination of HIF-1α, resulting in the stabilization of HIF-1α, consequently contributing to HIF-1α-mediated upregulation of PD-L1 under hypoxia. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens | 
				
              | + | 
              
              STAT3 | up-regulates quantity by expression   
              transcriptional regulation
               | 
              CD274 | 
              
              0.467 | 
                    
						
							
								
									| Identifier | 
									Residue | 
									Sequence | 
									Organism | 
									Cell Line | 
								 
							
								
								
									| SIGNOR-259188 | 
									 | 
									 | 
									Homo sapiens | 
									 | 
								
								 
									| pmid | 
									sentence | 
								 
								 
									| 27141364 | 
								
									STAT3 and HIF-1α cooperatively enhance PD-L1 expression in EML4-ALK-translocated pADC cells under hypoxia.The protein-DNA binding assay revealed that pSTAT3 was bound to the PD-L1 promoter region in H23 cells transfected with EML4-ALK. | 
								 
						 
                     | 
              
               
			   
					| Publications: | 
					
				
					1 | 
					Organism: | 
							Homo Sapiens |