32MQ | pdb_000032mq

Crystal structure of the de novo heme-binding peptide GRW-L16CL30H

PDB DOI: https://doi.org/10.2210/pdb32MQ/pdb

Classification: DE NOVO PROTEIN
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 2026-07-16 Released: 2026-10-21
Deposition Author(s): Leone, P., Roig-Zamboni, V., de Assis Modenez, I., Ivancich, A., Pecoraro, V.L.
Funding Organization(s): National Institutes of Health/National Center for Research Resources (NIH/NCRR), Other government

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.90 Å
R-Value Free:
0.255 (Depositor), 0.259 (DCC)
R-Value Work:
0.235 (Depositor), 0.227 (DCC)
R-Value Observed:
0.236 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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

Literature

The crystal structure of a designed, self-assembling heme-binding peptide at elevated pH

de Assis Modenez, I., Roig-Zamboni, V., Leone, P., Ivancich, A., Pecoraro, V.L.

(2026) Protein Sci

DOI: https://doi.org/10.1002/pro.70829

Macromolecule Content

Total Structure Weight: 18.77 kDa
Atom Count: 1,297
Modeled Residue Count: 142
Deposited Residue Count: 152
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GRW-L16CL30H	A, B, C, D	38	Homo sapiens	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HEM (Subject of Investigation/LOI) Query on HEM Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain J [auth D] MOL2 format, chain E [auth A] MOL2 format, chain J [auth D] mmCIF format, chain E [auth A] mmCIF format, chain J [auth D]	E [auth A], J [auth D]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain E [auth A] Focus chain J [auth D] Interactions & Density Focus chain E [auth A] Focus chain J [auth D]
GOL Query on GOL Download:Ideal Coordinates CCD File SDF format, chain G [auth B] MOL2 format, chain G [auth B] mmCIF format, chain G [auth B]	G [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain G [auth B] Interactions & Density Focus chain G [auth B]
CL Query on CL Download:Ideal Coordinates CCD File SDF format, chain L [auth D] SDF format, chain K [auth D] SDF format, chain I [auth C] SDF format, chain H [auth C] SDF format, chain F [auth A] MOL2 format, chain L [auth D] MOL2 format, chain K [auth D] MOL2 format, chain I [auth C] MOL2 format, chain H [auth C] MOL2 format, chain F [auth A] mmCIF format, chain L [auth D] mmCIF format, chain K [auth D] mmCIF format, chain I [auth C] mmCIF format, chain H [auth C] mmCIF format, chain F [auth A]	F [auth A], H [auth C], I [auth C], K [auth D], L [auth D]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain F [auth A] Focus chain H [auth C] Focus chain I [auth C] Focus chain K [auth D] Focus chain L [auth D] Interactions & Density Focus chain F [auth A] Focus chain H [auth C] Focus chain I [auth C] Focus chain K [auth D] Focus chain L [auth D]