28WB | pdb_000028wb

Crystal structure of the STRUBBELIG-RECEPTOR FAMILY 6 (SRF6) ectodomain from Arabidopsis thaliana

PDB DOI: https://doi.org/10.2210/pdb28WB/pdb

Classification: MEMBRANE PROTEIN
Organism(s): Arabidopsis thaliana
Expression System: Trichoplusia ni
Mutation(s): No

Deposited: 2026-02-23 Released: 2026-03-04
Deposition Author(s): Hohmann, U., Cargenato, A., Hothorn, M.
Funding Organization(s): Swiss National Science Foundation

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.50 Å
R-Value Free:
0.195 (Depositor), 0.203 (DCC)
R-Value Work:
0.162 (Depositor), 0.176 (DCC)

wwPDB Validation 3D Report Full Report

Validation slider image for 28WB

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

Literature

Using the ExMatrix crystallization screen to determine the crystal structure of the plant cell wall receptor SRF6 ectodomain.

Caregnato, A., Hohmann, U., Hothorn, M.

To be published.

Macromolecule Content

Total Structure Weight: 28.77 kDa
Atom Count: 2,008
Modeled Residue Count: 226
Deposited Residue Count: 267
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein STRUBBELIG-RECEPTOR FAMILY 6	A	267	Arabidopsis thaliana	Mutation(s): 0 Gene Names: SRF6, At1g53730, F22G10.3, F22G10.31
UniProt
Find proteins for Q9C8M9 (Arabidopsis thaliana) Explore Q9C8M9 Go to UniProtKB: Q9C8M9
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q9C8M9
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CIT Query on CIT Download:Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	CITRIC ACID C₆ H₈ O₇ KRKNYBCHXYNGOX-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]
NA Query on NA Download:Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain B [auth A] MOL2 format, chain C [auth A] MOL2 format, chain B [auth A] mmCIF format, chain C [auth A] mmCIF format, chain B [auth A]	B [auth A], C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Focus chain C [auth A] Interactions & Density Focus chain B [auth A] Focus chain C [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.50 Å
R-Value Free: 0.195 (Depositor), 0.203 (DCC)
R-Value Work: 0.162 (Depositor), 0.176 (DCC)

Diffraction Data:

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.72	α = 90
b = 76.72	β = 90
c = 86.43	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-03-04

Deposition Author(s):

Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	310030_205201

Revision History (Full details and data files)

Version 1.0: 2026-03-04
Type: Initial release

RCSB PDB is hosted by

RCSB PDB is a member of

RCSB Partners
Nucleic Acid Knowledgebase

CoreTrustSeal

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.