9K9N | pdb_00009k9n

Cryo-EM structure of MjHKU4r-CoV-1 receptor-binding domain complexed with human CD26

PDB DOI: https://doi.org/10.2210/pdb9K9N/pdb
EM Map EMD-62194: EMDB EMDataResource

Classification: VIRAL PROTEIN/HYDROLASE
Organism(s): Homo sapiens, Tylonycteris bat coronavirus HKU4
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2024-10-27 Released: 2025-09-03
Deposition Author(s): Sun, J.Q.
Funding Organization(s): Chinese Academy of Sciences

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.61 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 9K9N

This is version 1.0 of the entry. See complete history.

Literature

Rational design of human CD26 receptor for a strong neutralizing ability against MjHKU4r-CoV-1 and MERS-CoV

Zhang, Y., Tian, M., Han, Y., Sun, J., Li, W., Bai, C., Su, C., Han, P.

(2025) Hlife

DOI: https://doi.org/10.1016/j.hlife.2025.05.005

Macromolecule Content

Total Structure Weight: 207.89 kDa
Atom Count: 13,840
Modeled Residue Count: 1,657
Deposited Residue Count: 1,763
Unique protein chains: 2

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dipeptidyl peptidase 4 soluble form	A, B	766	Homo sapiens	Mutation(s): 0 Gene Names: DPP4, ADCP2, CD26 EC: 3.4.14.5
UniProt & NIH Common Fund Data Resources
Find proteins for P27487 (Homo sapiens) Explore P27487 Go to UniProtKB: P27487
PHAROS: P27487 GTEx: ENSG00000197635
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P27487
Glycosylation
Glycosylation Sites: 8	Glycosylation Focus chain A Focus chain B	Go to GlyGen: P27487-1
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Spike protein S1	C	231	Tylonycteris bat coronavirus HKU4	Mutation(s): 0
UniProt
Find proteins for A3EX94 (Bat coronavirus HKU4) Explore A3EX94 Go to UniProtKB: A3EX94
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A3EX94
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	D, E, F, I	2		N-Glycosylation	Interactions Focus chain D Focus chain E Focus chain F Focus chain I Interactions & Density Focus chain D Focus chain E Focus chain F Focus chain I
Glycosylation Resources
GlyTouCan: G42666HT GlyCosmos: G42666HT GlyGen: G42666HT

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	G	5		N-Glycosylation	Interactions Focus chain G Interactions & Density Focus chain G
Glycosylation Resources
GlyTouCan: G42227JK GlyCosmos: G42227JK GlyGen: G42227JK

Entity ID: 5
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	H	3		N-Glycosylation	Interactions Focus chain H Interactions & Density Focus chain H
Glycosylation Resources
GlyTouCan: G21290RB GlyCosmos: G21290RB GlyGen: G21290RB

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
NAG (Subject of Investigation/LOI) Query on NAG Download:Ideal Coordinates CCD File SDF format, chain S [auth B] SDF format, chain R [auth B] SDF format, chain Q [auth B] SDF format, chain P [auth B] SDF format, chain O [auth A] SDF format, chain N [auth A] SDF format, chain M [auth A] SDF format, chain L [auth A] SDF format, chain K [auth A] SDF format, chain J [auth A] MOL2 format, chain S [auth B] MOL2 format, chain R [auth B] MOL2 format, chain Q [auth B] MOL2 format, chain P [auth B] MOL2 format, chain O [auth A] MOL2 format, chain N [auth A] MOL2 format, chain M [auth A] MOL2 format, chain L [auth A] MOL2 format, chain K [auth A] MOL2 format, chain J [auth A] mmCIF format, chain S [auth B] mmCIF format, chain R [auth B] mmCIF format, chain Q [auth B] mmCIF format, chain P [auth B] mmCIF format, chain O [auth A] mmCIF format, chain N [auth A] mmCIF format, chain M [auth A] mmCIF format, chain L [auth A] mmCIF format, chain K [auth A] mmCIF format, chain J [auth A]	J [auth A] K [auth A] L [auth A] M [auth A] N [auth A] J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth B], Q [auth B], R [auth B], S [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Focus chain S [auth B] Interactions & Density Focus chain J [auth A] Focus chain K [auth A] Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain O [auth A] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Focus chain S [auth B]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.61 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2025-09-03

Deposition Author(s):

Funding Organization	Location	Grant Number
Chinese Academy of Sciences	China	XDB29010202

Revision History (Full details and data files)

Version 1.0: 2025-09-03
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.