[English] 日本語
Yorodumi
- PDB-9p96: CryoEM structure of the apo integrin alpha4beta7 -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 9p96
TitleCryoEM structure of the apo integrin alpha4beta7
Components
  • Integrin alpha-4
  • Integrin beta-7
KeywordsCELL ADHESION / a4b7 / gut adhesion / lymphocyte homing / membrane receptor
Function / homology
Function and homology information


clathrin-dependent extracellular exosome endocytosis / : / diapedesis / immune response in gut-associated lymphoid tissue / cell-matrix adhesion involved in ameboidal cell migration / integrin alpha4-beta7 complex / integrin alpha4-beta1 complex / cell-cell adhesion mediated by integrin / positive regulation of leukocyte tethering or rolling / axonogenesis involved in innervation ...clathrin-dependent extracellular exosome endocytosis / : / diapedesis / immune response in gut-associated lymphoid tissue / cell-matrix adhesion involved in ameboidal cell migration / integrin alpha4-beta7 complex / integrin alpha4-beta1 complex / cell-cell adhesion mediated by integrin / positive regulation of leukocyte tethering or rolling / axonogenesis involved in innervation / leukocyte tethering or rolling / RUNX3 Regulates Immune Response and Cell Migration / protein antigen binding / positive regulation of vascular endothelial cell proliferation / neuron projection extension / integrin complex / heterotypic cell-cell adhesion / negative regulation of vasoconstriction / leukocyte migration / leukocyte cell-cell adhesion / cell adhesion mediated by integrin / receptor clustering / cellular response to cytokine stimulus / endodermal cell differentiation / fibronectin binding / positive regulation of endothelial cell apoptotic process / Integrin cell surface interactions / positive regulation of T cell migration / coreceptor activity / T cell migration / cell adhesion molecule binding / substrate adhesion-dependent cell spreading / B cell differentiation / cell-matrix adhesion / integrin-mediated signaling pathway / Cell surface interactions at the vascular wall / cell-cell adhesion / integrin binding / cellular response to amyloid-beta / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / growth cone / virus receptor activity / Potential therapeutics for SARS / receptor complex / cell adhesion / external side of plasma membrane / focal adhesion / neuronal cell body / cell surface / extracellular exosome / metal ion binding / membrane / plasma membrane
Similarity search - Function
Integrin beta subunit, cytoplasmic domain / Integrin beta cytoplasmic domain / Integrin_b_cyt / : / Integrin alpha Ig-like domain 3 / Integrin beta subunit, tail / Integrin beta tail domain superfamily / Integrin_B_tail / EGF-like domain, extracellular / EGF-like domain ...Integrin beta subunit, cytoplasmic domain / Integrin beta cytoplasmic domain / Integrin_b_cyt / : / Integrin alpha Ig-like domain 3 / Integrin beta subunit, tail / Integrin beta tail domain superfamily / Integrin_B_tail / EGF-like domain, extracellular / EGF-like domain / Integrins beta chain EGF (I-EGF) domain profile. / Integrin beta subunit, VWA domain / Integrin beta subunit / Integrin beta N-terminal / Integrin beta chain VWA domain / Integrin plexin domain / Integrins beta chain EGF (I-EGF) domain signature. / Integrin beta subunits (N-terminal portion of extracellular region) / Integrin alpha-2 / Integrin alpha Ig-like domain 1 / Integrin alpha chain, C-terminal cytoplasmic region, conserved site / Integrins alpha chain signature. / Integrin alpha chain / Integrin alpha beta-propellor / : / Integrin alpha Ig-like domain 2 / FG-GAP repeat profile. / Integrin alpha (beta-propellor repeats). / FG-GAP repeat / FG-GAP repeat / Integrin alpha, N-terminal / Integrin domain superfamily / PSI domain / domain found in Plexins, Semaphorins and Integrins / von Willebrand factor A-like domain superfamily / EGF-like domain signature 1. / EGF-like domain signature 2.
Similarity search - Domain/homology
Integrin alpha-4 / Integrin beta-7
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsHollis, J.A. / Campbell, M.G.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM147414 United States
National Science Foundation (NSF, United States) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)T32GM008268 United States
CitationJournal: Sci Adv / Year: 2025
Title: Molecular exaptation by the integrin αI domain.
Authors: Jeremy A Hollis / Matthew C Chan / Harmit S Malik / Melody G Campbell /
Abstract: Integrins bind ligands between their alpha (α) and beta (β) subunits and transmit signals through conformational changes. Early in chordate evolution, some α subunits acquired an "inserted" (I) ...Integrins bind ligands between their alpha (α) and beta (β) subunits and transmit signals through conformational changes. Early in chordate evolution, some α subunits acquired an "inserted" (I) domain that expanded integrin's ligand-binding repertoire but obstructed the ancestral ligand pocket, seemingly blocking conventional integrin activation. Here, we compare cryo-electron microscopy structures of apo and ligand-bound states of the I domain-containing αEβ integrin and the I domain-lacking αβ integrin to illuminate how the I domain intrinsically mimics an extrinsic ligand to preserve integrin function. We trace the I domain's evolutionary origin to an ancestral collagen-collagen interaction domain, identifying an ancient molecular exaptation that facilitated integrin activation immediately upon I domain insertion. Our analyses reveal the evolutionary and biochemical basis of expanded cellular communication in vertebrates.
History
DepositionJun 24, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 24, 2025Provider: repository / Type: Initial release

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Integrin alpha-4
B: Integrin beta-7
hetero molecules


Theoretical massNumber of molelcules
Total (without water)155,0778
Polymers154,8372
Non-polymers2406
Water00
1


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

-
Components

#1: Protein Integrin alpha-4 / CD49 antigen-like family member D / Integrin alpha-IV / VLA-4 subunit alpha


Mass: 113632.453 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Ectodomain / Source: (gene. exp.) Homo sapiens (human) / Gene: ITGA4, CD49D / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: P13612
#2: Protein Integrin beta-7 / Gut homing receptor beta subunit


Mass: 41204.266 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: ectodomain / Source: (gene. exp.) Homo sapiens (human) / Gene: ITGB7 / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: P26010
#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: Ca
Has ligand of interestN
Has protein modificationY

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Heterodimer of integrin alpha4beta7 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Cricetulus griseus (Chinese hamster)
Buffer solutionpH: 7.4
SpecimenConc.: 0.15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

-
Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

-
Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
2PHENIX1.20.1_4487model refinement
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 202130 / Symmetry type: POINT
RefinementHighest resolution: 3.1 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0037604
ELECTRON MICROSCOPYf_angle_d0.52310309
ELECTRON MICROSCOPYf_dihedral_angle_d5.661048
ELECTRON MICROSCOPYf_chiral_restr0.0451128
ELECTRON MICROSCOPYf_plane_restr0.0041363

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more