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- PDB-8vrw: Cryo-EM structure of human invariant chain in complex with HLA-DR15 -

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Basic information

Entry
Database: PDB / ID: 8vrw
TitleCryo-EM structure of human invariant chain in complex with HLA-DR15
Components
  • HLA class II histocompatibility antigen gamma chain
  • HLA class II histocompatibility antigen, DR alpha chain
  • HLA class II histocompatibility antigen, DRB1 beta chain
KeywordsIMMUNE SYSTEM / Antigen presentation / membrane protein / trimeric complex
Function / homology
Function and homology information


negative regulation of peptide secretion / macrophage migration inhibitory factor signaling pathway / NOS2-CD74 complex / MHC class II protein binding, via antigen binding groove / antigen processing and presentation of endogenous antigen / positive regulation of dendritic cell antigen processing and presentation / negative regulation of T cell differentiation / macrophage migration inhibitory factor binding / positive regulation of macrophage migration inhibitory factor signaling pathway / protein trimerization ...negative regulation of peptide secretion / macrophage migration inhibitory factor signaling pathway / NOS2-CD74 complex / MHC class II protein binding, via antigen binding groove / antigen processing and presentation of endogenous antigen / positive regulation of dendritic cell antigen processing and presentation / negative regulation of T cell differentiation / macrophage migration inhibitory factor binding / positive regulation of macrophage migration inhibitory factor signaling pathway / protein trimerization / macrophage migration inhibitory factor receptor complex / positive regulation of cytokine-mediated signaling pathway / regulation of interleukin-4 production / regulation of interleukin-10 production / T cell activation involved in immune response / myeloid dendritic cell antigen processing and presentation / antigen processing and presentation of endogenous peptide antigen via MHC class II / autolysosome membrane / positive regulation of prostaglandin biosynthetic process / regulation of T-helper cell differentiation / T cell selection / positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / positive regulation of type 2 immune response / negative thymic T cell selection / host-mediated suppression of symbiont invasion / MHC class II receptor activity / MHC class II protein binding / positive regulation of CD4-positive, alpha-beta T cell activation / antigen processing and presentation of peptide or polysaccharide antigen via MHC class II / negative regulation of mature B cell apoptotic process / positive regulation of T cell mediated immune response to tumor cell / positive regulation of memory T cell differentiation / positive regulation of kinase activity / positive thymic T cell selection / CD4 receptor binding / positive regulation of monocyte differentiation / inflammatory response to antigenic stimulus / vacuole / positive regulation of chemokine (C-X-C motif) ligand 2 production / cytokine receptor activity / positive regulation of neutrophil chemotaxis / prostaglandin biosynthetic process / intermediate filament / positive regulation of macrophage cytokine production / positive regulation of T cell differentiation / T-helper 1 type immune response / nitric-oxide synthase binding / regulation of macrophage activation / transport vesicle membrane / negative regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / antigen processing and presentation / cytokine binding / negative regulation of DNA damage response, signal transduction by p53 class mediator / polysaccharide binding / positive regulation of insulin secretion involved in cellular response to glucose stimulus / negative regulation of type II interferon production / humoral immune response / macrophage differentiation / immunoglobulin mediated immune response / : / Generation of second messenger molecules / immunological synapse / response to type II interferon / Co-inhibition by PD-1 / epidermis development / T cell receptor binding / detection of bacterium / negative regulation of T cell proliferation / positive regulation of chemokine production / positive regulation of B cell proliferation / MHC class II antigen presentation / protein folding chaperone / multivesicular body / lysosomal lumen / negative regulation of cell migration / trans-Golgi network membrane / positive regulation of interleukin-8 production / Cell surface interactions at the vascular wall / lumenal side of endoplasmic reticulum membrane / protein tetramerization / intracellular protein transport / negative regulation of inflammatory response to antigenic stimulus / peptide antigen assembly with MHC class II protein complex / clathrin-coated endocytic vesicle membrane / MHC class II protein complex / ER to Golgi transport vesicle membrane / antigen processing and presentation of exogenous peptide antigen via MHC class II / structural constituent of cytoskeleton / positive regulation of immune response / peptide antigen binding / positive regulation of interleukin-6 production / positive regulation of T cell mediated cytotoxicity / positive regulation of T cell activation / cognition / positive regulation of fibroblast proliferation / Interferon gamma signaling / MHC class II protein complex binding / endocytic vesicle membrane
Similarity search - Function
MHC class II-associated invariant chain, trimerisation / MHC class II-associated invariant chain/CLIP, MHC II-interacting / MHC class II-associated invariant chain / MHC class II-associated invariant chain, trimerisation domain superfamily / HLA class II histocompatibility antigen, gamma subunit / Class II MHC-associated invariant chain trimerisation domain / CLIP, MHC2 interacting / : / Thyroglobulin type-1 repeat signature. / Thyroglobulin type-1 ...MHC class II-associated invariant chain, trimerisation / MHC class II-associated invariant chain/CLIP, MHC II-interacting / MHC class II-associated invariant chain / MHC class II-associated invariant chain, trimerisation domain superfamily / HLA class II histocompatibility antigen, gamma subunit / Class II MHC-associated invariant chain trimerisation domain / CLIP, MHC2 interacting / : / Thyroglobulin type-1 repeat signature. / Thyroglobulin type-1 / Thyroglobulin type-1 superfamily / Thyroglobulin type-1 repeat / Thyroglobulin type-1 domain profile. / Thyroglobulin type I repeats. / MHC class II, beta chain, N-terminal / Class II histocompatibility antigen, beta domain / Class II histocompatibility antigen, beta domain / MHC class II, alpha chain, N-terminal / Class II histocompatibility antigen, alpha domain / Class II histocompatibility antigen, alpha domain / MHC class II, alpha/beta chain, N-terminal / MHC classes I/II-like antigen recognition protein / : / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold
Similarity search - Domain/homology
HLA class II histocompatibility antigen, DR alpha chain / HLA class II histocompatibility antigen, DRB1 beta chain / HLA class II histocompatibility antigen gamma chain
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.03 Å
AuthorsWang, N. / Caveney, N.A. / Jude, K.M. / Garcia, K.C.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)NIH R01 AI103867 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2024
Title: Structural insights into human MHC-II association with invariant chain.
Authors: Nan Wang / Deepa Waghray / Nathanael A Caveney / Kevin M Jude / K Christopher Garcia /
Abstract: The loading of processed peptides on to major histocompatibility complex II (MHC-II) molecules for recognition by T cells is vital to cell-mediated adaptive immunity. As part of this process, MHC-II ...The loading of processed peptides on to major histocompatibility complex II (MHC-II) molecules for recognition by T cells is vital to cell-mediated adaptive immunity. As part of this process, MHC-II associates with the invariant chain (Ii) during biosynthesis in the endoplasmic reticulum to prevent premature peptide loading and to serve as a scaffold for subsequent proteolytic processing into MHC-II-CLIP. Cryo-electron microscopy structures of full-length Human Leukocyte Antigen-DR (HLA-DR) and HLA-DQ complexes associated with Ii, resolved at 3.0 to 3.1 Å, elucidate the trimeric assembly of the HLA/Ii complex and define atomic-level interactions between HLA, Ii transmembrane domains, loop domains, and class II-associated invariant chain peptides (CLIP). Together with previous structures of MHC-II peptide loading intermediates DO and DM, our findings complete the structural path governing class II antigen presentation.
History
DepositionJan 22, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 8, 2024Provider: repository / Type: Initial release
Revision 1.1May 15, 2024Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Oct 23, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: HLA class II histocompatibility antigen, DR alpha chain
B: HLA class II histocompatibility antigen, DRB1 beta chain
C: HLA class II histocompatibility antigen gamma chain
D: HLA class II histocompatibility antigen, DR alpha chain
E: HLA class II histocompatibility antigen, DRB1 beta chain
F: HLA class II histocompatibility antigen gamma chain
G: HLA class II histocompatibility antigen, DR alpha chain
H: HLA class II histocompatibility antigen, DRB1 beta chain
I: HLA class II histocompatibility antigen gamma chain


Theoretical massNumber of molelcules
Total (without water)303,2679
Polymers303,2679
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein HLA class II histocompatibility antigen, DR alpha chain / MHC class II antigen DRA


Mass: 32418.971 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-DRA, HLA-DRA1 / Production host: Mammalia (mammals) / References: UniProt: P01903
#2: Protein HLA class II histocompatibility antigen, DRB1 beta chain / Human leukocyte antigen DRB1 / HLA-DRB1


Mass: 33768.199 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-DRB1 / Production host: Mammalia (mammals) / References: UniProt: P01911
#3: Protein HLA class II histocompatibility antigen gamma chain / HLA-DR antigens-associated invariant chain / Ia antigen-associated invariant chain / Ii


Mass: 34901.906 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CD74, DHLAG / Production host: Mammalia (mammals) / References: UniProt: P04233
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Trimeric complex of invariant chain associated with HLA-DRA1 and HLA-DRB1
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.33 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Mammalia (mammals)
Buffer solutionpH: 8
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.03 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 391922 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL

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