9P51 | pdb_00009p51

Crystal structure of MLH1-CTD with CHDI-00915848

PDB DOI: https://doi.org/10.2210/pdb9P51/pdb

Classification: DNA BINDING PROTEIN
Organism(s): Homo sapiens
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-06-17 Released: 2026-06-24
Deposition Author(s): Zhu, G., Koszelak-Rosenblum, M.
Funding Organization(s): Other private

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.25 Å
R-Value Free:
0.219 (Depositor), 0.221 (DCC)
R-Value Work:
0.199 (Depositor), 0.205 (DCC)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Validation slider image for 9P51

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

Literature

Cyclic Peptide Inhibitors of the MLH1-MSH3 Interaction as a Potential Therapeutic Strategy for Huntington's Disease

Haque, T.S., Orvieto, F., Tomaselli, S., Turcano, L., De Simone, D., Francone, A., Micaelli, M., Movetti, S., Piacenti, V., Gambini, L., Alli, C., Fodale, V., Bianchi, E., Toniatti, C., Kawahara, D., Ghosh, S., Koszelak-Rosenblum, M., Zhu, G., Kintzel, S., Williams, D., Larocque, J., Thieulin-Pardo, G., Thomsen, M., Dominguez, C., Iyer, R.R., Finley, M., Felsenfeld, D., Boudet, J., Monteagudo, E., Vogt, T.F., Prasad, B.C.

(null) ChemRxiv 2026

DOI: https://doi.org/10.26434/chemrxiv.15000289/v2

Macromolecule Content

Total Structure Weight: 61.5 kDa
Atom Count: 4,295
Modeled Residue Count: 512
Deposited Residue Count: 536
Unique protein chains: 2

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA mismatch repair protein Mlh1	A, B	257	Homo sapiens	Mutation(s): 0 Gene Names: MLH1, COCA2
UniProt & NIH Common Fund Data Resources
Find proteins for P40692 (Homo sapiens) Explore P40692 Go to UniProtKB: P40692
PHAROS: P40692 GTEx: ENSG00000076242
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P40692
Sequence Annotations Expand
Reference Sequence

Find similar proteins by: Sequence | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CYS-GLN-ALA-VAL-ARG-SER-LYS-TYR-PHE-GLN-CYS	C, D	11	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.25 Å
R-Value Free: 0.219 (Depositor), 0.221 (DCC)
R-Value Work: 0.199 (Depositor), 0.205 (DCC)

Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.06	α = 90
b = 225.57	β = 90
c = 44.09	γ = 90

Software Package:

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

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-06-24

Deposition Author(s):

Koszelak-Rosenblum, M.

Funding Organization	Location	Grant Number
Other private		--

Revision History (Full details and data files)

Version 1.0: 2026-06-24
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.