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Details on Person UniProt:P04440 HLA-DPB1
| Class:Id | ReferenceGeneProduct:56341 |
|---|---|
| _chainChangeLog | signal peptide:1-29 added on Sat February 7 2015;chain:30-258 added on Sat February 7 2015 |
| _displayName | UniProt:P04440 HLA-DPB1 |
| _timestamp | 2024-11-03 20:00:29 |
| chain | signal peptide:1-29 chain:30-258 |
| checksum | E74777D438DE9C41 |
| comment | FUNCTION Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route, where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules, and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments, exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides, autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs, other cells of the gastrointestinal tract, such as epithelial cells, express MHC class II molecules and CD74 and act as APCs, which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen, three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form a heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs, CD74 undergoes a sequential degradation by various proteases, including CTSS and CTSL, leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B-cells, the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal microenvironment has been implicated in the regulation of antigen loading into MHC II molecules, increased acidification produces increased proteolysis and efficient peptide loading.SUBUNIT Heterodimer of an alpha and a beta subunit; also referred as MHC class II molecule. In the endoplasmic reticulum (ER) it forms a heterononamer; 3 MHC class II molecules bind to a CD74 homotrimer (also known as invariant chain or HLA class II histocompatibility antigen gamma chain). In the endosomal/lysosomal system; CD74 undergoes sequential degradation by various proteases; leaving a small fragment termed CLIP on each MHC class II molecule. MHC class II molecule interacts with HLA_DM, and HLA_DO in B-cells, in order to release CLIP and facilitate the binding of antigenic peptides.INTERACTION The MHC class II complex transits through a number of intracellular compartments in the endocytic pathway until it reaches the cell membrane for antigen presentation.POLYMORPHISM The following alleles of HLA-DPB1 are known: DPB1*01:01, DPB1*01:02, DPB1*02:01, DPB1*02:02, DPB1*02:03, DPB1*03:01, DPB1*03:02, DPB1*04:01, DPB1*04:02, DPB1*04:03, DPB1*05:01, DPB1*05:02, DPB1*06:01, DPB1*06:02, DPB1*08:01, DPB1*08:02, DPB1*09:01, DPB1*09:02, DPB1*10:01, DPB1*10:02, DPB1*11:01, DPB1*11:02, DPB1*13:01, DPB1*13:02, DPB1*14:01, DPB1*14:02, DPB1*15:01, DPB1*15:02, DPB1*16:01, DPB1*16:02, DPB1*17:01, DPB1*17:02, DPB1*18:01, DPB1*18:02, DPB1*19:01, DPB1*19:02, DPB1*20:01, DPB1*20:02, DPB1*21:01, DPB1*21:02, DPB1*22:01, DPB1*22:02, DPB1*23:01, DPB1*24:01, DPB1*24:02, DPB1*25:01, DPB1*25:02, DPB1*26:01, DPB1*26:02, DPB1*27:01, DPB1*28:01, DPB1*29:01, DPB1*30:01, DPB1*31:01, DPB1*32:01, DPB1*33:01, DPB1*34:01, DPB1*35:01, DPB1*36:01, DPB1*37:01, DPB1*38:01, DPB1*39:01, DPB1*40:01, DPB1*41:01, DPB1*44:01, DPB1*45:01, DPB1*46:01, DPB1*47:01, DPB1*48:01, DPB1*49:01, DPB1*50:01, DPB1*51:01, DPB1*52:01, DPB1*53:01, DPB1*54:01, DPB1*55:01, DPB1*56:01, DPB1*57:01, DPB1*58:01, DPB1*59:01, DPB1*60:01, DPB1*62:01, DPB1*63:01, DPB1*65:01, DPB1*66:01, DPB1*67:01, DPB1*68:01, DPB1*69:01, DPB1*70:01, DPB1*71:01, DPB1*72:01, DPB1*73:01, DPB1*74:01, DPB1*75:01, DPB1*76:01, DPB1*77:01, DPB1*78:01, DPB1*79:01, DPB1*80:01, DPB1*81:01, DPB1*82:01, DPB1*83:01, DPB1*84:01, DPB1*85:01, DPB1*86:01, DPB1*87:01, DPB1*88:01, DPB1*89:01, DPB1*90:01, DPB1*91:01, DPB1*92:01, DPB1*93:01, DPB1*94:01, DPB1*95:01, DPB1*96:01, DPB1*97:01, DPB1*98:01 and DPB1*99:01. The sequence shown is that of DPB1*04:01.SIMILARITY Belongs to the MHC class II family. |
| description | recommendedName: HLA class II histocompatibility antigen, DP beta 1 chain alternativeName: HLA class II histocompatibility antigen, DP(W4) beta chain alternativeName: MHC class II antigen DPB1 |
| geneName | HLA-DPB1 HLA-DP1B |
| identifier | P04440 |
| isSequenceChanged | FALSE |
| keyword | 3D-structure Adaptive immunity Cell membrane Disulfide bond Endoplasmic reticulum Endosome Glycoprotein Golgi apparatus Immunity Lysosome Membrane MHC II Proteomics identification Reference proteome Signal Transmembrane Transmembrane helix |
| modified | [InstanceEdit:84067] Schmidt, EE, 2003-12-18 04:29:09 [InstanceEdit:143527] Schmidt, EE, 2004-11-12 07:45:10 [InstanceEdit:217385] Schmidt, EE, 2008-03-27 06:23:53 [InstanceEdit:354386] Schmidt, EE, 2008-06-18 04:45:12 [InstanceEdit:384350] Kanapin, AA, 2008-11-26 14:00:39 [InstanceEdit:392885] Kanapin, AA, 2009-03-09 12:07:18 [InstanceEdit:400710] Schmidt, EE, 2009-03-25 05:33:35 [InstanceEdit:423310] Kanapin, AA [InstanceEdit:435478] Kanapin, AA [InstanceEdit:435871] Kanapin, AA [InstanceEdit:447347] Kanapin, AA [InstanceEdit:525883] Kanapin, AA [InstanceEdit:613449] Kanapin, AA [InstanceEdit:797602] Kanapin, AA [InstanceEdit:937368] Yung, CK [InstanceEdit:1042053] Yung, CK [InstanceEdit:1220657] Yung, CK [InstanceEdit:1300696] Yung, CK [InstanceEdit:1301627] Yung, CK [InstanceEdit:1551960] Weiser, JD [InstanceEdit:1995863] Weiser, JD [InstanceEdit:2132304] Weiser, JD [InstanceEdit:2265580] Weiser, JD [InstanceEdit:2587579] Weiser, JD [InstanceEdit:5083144] Weiser, JD [InstanceEdit:5433710] Weiser, JD [InstanceEdit:5618415] Weiser, JD [InstanceEdit:5634237] Weiser, JD [InstanceEdit:5673015] Weiser, JD [InstanceEdit:8987656] Weiser, JD [InstanceEdit:9037114] Weiser, JD [InstanceEdit:9637257] Weiser, JD [InstanceEdit:9657908] Weiser, JD [InstanceEdit:9676415] Weiser, JD [InstanceEdit:9715482] Weiser, JD [InstanceEdit:9852000] Weiser, Joel, 2023-11-03 [InstanceEdit:9926675] Weiser, Joel, 2024-11-03 |
| name | HLA-DPB1 |
| referenceDatabase | [ReferenceDatabase:2] UniProt |
| referenceGene | [ReferenceDNASequence:8989488] ENSEMBL:ENSG00000223865 HLA-DPB1 [Homo sapiens] |
| secondaryIdentifier | DPB1_HUMAN A0PFJ7 A5I886 A8YPB3 B5U8B4 B7VF80 B7VF87 B8ZX68 B8ZYT0 B9W5S8 B9W6F7 B9W6F9 C0MPP5 C0MPQ2 C0MPQ3 C0MPQ5 C0MPQ6 C0MPQ7 C4R9J5 C5IZL1 O00259 O19698 O19700 O19702 O19749 O46884 O77952 O98215 O98216 O98217 O98218 O98219 O98222 O98223 P01916 P04232 P13763 P79493 P79608 Q0P0L4 Q0ZFN3 Q14279 Q27S71 Q29682 Q29684 Q29698 Q29714 Q29775 Q29776 Q29778 Q29779 Q29781 Q29827 Q29828 Q29879 Q29880 Q29898 Q29977 Q2MGW3 Q30015 Q30031 Q30032 Q30033 Q30034 Q30050 Q30051 Q30052 Q30053 Q30054 Q30055 Q30174 Q4GY31 Q4JHD8 Q5ENE0 Q5ENE1 Q5ENW3 Q5EP46 Q5EP47 Q5EP49 Q5EP51 Q5EP52 Q5EP53 Q5EP56 Q5I4H8 Q5I4H9 Q5ISH4 Q5ISH5 Q5SQ73 Q5STP2 Q5YLA6 Q6IVX1 Q6LBX2 Q6LBX3 Q6LBX4 Q6LBX5 Q6LBX6 Q6LBX7 Q6PWX6 Q6TAS4 Q714U1 Q714U2 Q7YQ10 Q860Z7 Q8HWL7 Q8HWT5 Q8SNC4 Q95HC1 Q95IT7 Q95IT8 Q9BD13 Q9GIM2 Q9GIM4 Q9GIX6 Q9GJ41 Q9MY67 Q9TNT7 Q9TQE2 Q9XS11 Q9XS12 |
| sequenceLength | 258 |
| species | [Species:48887] Homo sapiens |
| (referenceEntity) | [EntityWithAccessionedSequence:197648] HLA class II histocompatibility antigen, DP [plasma membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130390] HLA class II histocompatibility antigen, DP [clathrin-coated endocytic vesicle membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130397] HLA class II histocompatibility antigen, DP [trans-Golgi network membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130419] HLA class II histocompatibility antigen, DP [endocytic vesicle membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130533] HLA class II histocompatibility antigen, DP [transport vesicle membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130601] HLA class II histocompatibility antigen, DP [lysosomal membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130688] HLA class II histocompatibility antigen, DP [ER to Golgi transport vesicle membrane] [Homo sapiens] [EntityWithAccessionedSequence:2130709] HLA class II histocompatibility antigen, DP [lumenal side of endoplasmic reticulum membrane] [Homo sapiens] [EntityWithAccessionedSequence:2214364] HLA class II histocompatibility antigen, DP [Golgi membrane] [Homo sapiens] |
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No pathways have been reviewed or authored by UniProt:P04440 HLA-DPB1 (56341)
