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- EMDB-62735: A local Cryo_EM structure of CCR7 complex with CCL21 -

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Basic information

Entry
Database: EMDB / ID: EMD-62735
TitleA local Cryo_EM structure of CCR7 complex with CCL21
Map data
Sample
  • Complex: A local Cryo_EM structure of CCR7 complex with CCR21
    • Protein or peptide: C-C motif chemokine 21
    • Protein or peptide: C-C chemokine receptor type 7
KeywordsGPCR / CCL21 / CCR7 / MEMBRANE PROTEIN
Function / homology
Function and homology information


mesangial cell-matrix adhesion / dendritic cell dendrite assembly / negative regulation of dendritic cell dendrite assembly / positive regulation of hypersensitivity / chemokine (C-C motif) ligand 19 binding / chemokine (C-C motif) ligand 21 binding / C-C motif chemokine 19 receptor activity / C-C motif chemokine 21 receptor activity / : / regulation of dendritic cell dendrite assembly ...mesangial cell-matrix adhesion / dendritic cell dendrite assembly / negative regulation of dendritic cell dendrite assembly / positive regulation of hypersensitivity / chemokine (C-C motif) ligand 19 binding / chemokine (C-C motif) ligand 21 binding / C-C motif chemokine 19 receptor activity / C-C motif chemokine 21 receptor activity / : / regulation of dendritic cell dendrite assembly / myeloid dendritic cell chemotaxis / CCL19-activated CCR7 signaling pathway / CCL21-activated CCR7 signaling pathway / CCR7 chemokine receptor binding / positive regulation of immunological synapse formation / positive regulation of T cell costimulation / positive regulation of phospholipase C/protein kinase C signal transduction / positive regulation of humoral immune response / lymphocyte migration into lymph node / chemokine (C-C motif) ligand 21 signaling pathway / mature conventional dendritic cell differentiation / positive regulation of dendritic cell antigen processing and presentation / positive regulation of myeloid dendritic cell chemotaxis / negative regulation of leukocyte tethering or rolling / positive regulation of glycoprotein biosynthetic process / positive regulation of dendritic cell chemotaxis / establishment of T cell polarity / regulation of interleukin-1 beta production / chemokine receptor binding / positive regulation of T cell chemotaxis / immunological synapse formation / CCR chemokine receptor binding / regulation of type II interferon production / positive regulation of pseudopodium assembly / negative thymic T cell selection / negative regulation of interleukin-12 production / positive regulation of chemotaxis / negative regulation of dendritic cell apoptotic process / C-C chemokine receptor activity / cellular response to chemokine / chemokine-mediated signaling pathway / eosinophil chemotaxis / ruffle organization / regulation of Cdc42 protein signal transduction / positive regulation of cell adhesion mediated by integrin / chemokine activity / positive regulation of neutrophil chemotaxis / Chemokine receptors bind chemokines / positive regulation of filopodium assembly / dendritic cell chemotaxis / positive regulation of cell motility / response to nitric oxide / positive regulation of cell-matrix adhesion / cellular response to cytokine stimulus / positive regulation of actin filament polymerization / positive regulation of T cell receptor signaling pathway / positive regulation of Rac protein signal transduction / homeostasis of number of cells / positive regulation of T cell migration / cell maturation / T cell costimulation / release of sequestered calcium ion into cytosol / positive regulation of interleukin-12 production / positive regulation of cell adhesion / cell chemotaxis / positive regulation of JNK cascade / calcium-mediated signaling / G protein-coupled receptor activity / positive regulation of receptor-mediated endocytosis / antimicrobial humoral immune response mediated by antimicrobial peptide / cell-cell signaling / cellular response to prostaglandin E stimulus / positive regulation of cytosolic calcium ion concentration / response to lipopolysaccharide / G alpha (i) signalling events / positive regulation of ERK1 and ERK2 cascade / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of canonical NF-kappaB signal transduction / immune response / positive regulation of cell migration / G protein-coupled receptor signaling pathway / inflammatory response / external side of plasma membrane / cell surface / mitochondrion / extracellular space / extracellular region / plasma membrane
Similarity search - Function
CC chemokine receptor 7 / Chemokine CC, DCCL motif-cointaining domain / Chemokine receptor family / : / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily / Small cytokines (intecrine/chemokine), interleukin-8 like / G-protein coupled receptors family 1 signature. ...CC chemokine receptor 7 / Chemokine CC, DCCL motif-cointaining domain / Chemokine receptor family / : / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily / Small cytokines (intecrine/chemokine), interleukin-8 like / G-protein coupled receptors family 1 signature. / 7 transmembrane receptor (rhodopsin family) / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile.
Similarity search - Domain/homology
C-C motif chemokine 21 / C-C chemokine receptor type 7
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsDuan J / Yuan Q / Cao Y
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: A local Cryo_EM structure of CCR7 complex with CCL21
Authors: Duan J / Yuan Q / Cao Y
History
DepositionDec 13, 2024-
Header (metadata) releaseDec 17, 2025-
Map releaseDec 17, 2025-
UpdateDec 17, 2025-
Current statusDec 17, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_62735.png

Downloads & links

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Map

FileDownload / File: emd_62735.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.04 Å/pix.
x 256 pix.
= 266.24 Å		1.04 Å/pix.
x 256 pix.
= 266.24 Å		1.04 Å/pix.
x 256 pix.
= 266.24 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.04 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.4
Minimum - Maximum-3.987955 - 5.7990947
Average (Standard dev.)-0.0022699074 (±0.065639146)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 266.24 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_62735_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_62735_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : A local Cryo_EM structure of CCR7 complex with CCR21

EntireName: A local Cryo_EM structure of CCR7 complex with CCR21
Components
  • Complex: A local Cryo_EM structure of CCR7 complex with CCR21
    • Protein or peptide: C-C motif chemokine 21
    • Protein or peptide: C-C chemokine receptor type 7

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Supramolecule #1: A local Cryo_EM structure of CCR7 complex with CCR21

SupramoleculeName: A local Cryo_EM structure of CCR7 complex with CCR21 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: C-C motif chemokine 21

MacromoleculeName: C-C motif chemokine 21 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8.807232 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
SDGGAQDCCL KYSQRKIPAK VVRSYRKQEP SLGCSIPAIL FLPRKRSQAE LCADPKELWV QQLMQHLDKT PSPQKPAQ

UniProtKB: C-C motif chemokine 21

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Macromolecule #2: C-C chemokine receptor type 7

MacromoleculeName: C-C chemokine receptor type 7 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 39.243426 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: QDEVTDDYIG DNTTVDYTLF ESLCSKKDVR NFKAWFLPIM YSIICFVGLL GNGLVVLTYI YFKRLKTMTD TYLLNLAVAD ILFLLTLPF WAYSAAKSWV FGVHFCKLIF AIYKMSFFSG MLLLLCISID RYVAIVQAVS AHRHRARVLL ISKLSCVGIW I LATVLSIP ...String:
QDEVTDDYIG DNTTVDYTLF ESLCSKKDVR NFKAWFLPIM YSIICFVGLL GNGLVVLTYI YFKRLKTMTD TYLLNLAVAD ILFLLTLPF WAYSAAKSWV FGVHFCKLIF AIYKMSFFSG MLLLLCISID RYVAIVQAVS AHRHRARVLL ISKLSCVGIW I LATVLSIP ELLYSDLQRS SSEQAMRCSL ITEHVEAFIT IQVAQMVIGF LVPLLAMSFC YLVIIRTLLQ ARNFERNKAI KV IIAVVVV FIVFQLPYNG VVLAQTVANF NITSSTCELS KQLNIAYDVT YSLACVRCCV NPFLYAFIGV KFRNDLFKLF KDL GCLSQE QLRQWSSCRH IRRSSMSV

UniProtKB: C-C chemokine receptor type 7

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.04
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 18.0 µm / Nominal defocus min: 8.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 469279
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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