9HO4 | pdb_00009ho4

Crystal Structure of the Human Frataxin protein in complex with a tailored Camelid Nanobody 6B1

PDB DOI: https://doi.org/10.2210/pdb9HO4/pdb

Classification: OXIDOREDUCTASE
Organism(s): Homo sapiens, Lama glama
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2024-12-11 Released: 2025-12-24
Deposition Author(s): Garay-Alvarez, A., Molina, R., Hermoso, J.A.
Funding Organization(s): Agencia Estatal de Investigacion (AEI)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.76 Å
R-Value Free:
0.175 (Depositor), 0.250 (DCC)
R-Value Work:
0.151 (Depositor), 0.235 (DCC)

Starting Model: in silico
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wwPDB Validation 3D Report Full Report

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

Literature

Frataxin Stability and Function Modulation by Nanobody Interaction

Pignataro, M.F., Frenandez, N.B., Pavan, M.F., Garay-Alvarez, A., Molina, R., Grossi, J., Noguera, M., Vila, A., Garcia, A., Gentili, H., Rodriguez, N.A., Aran, M., Hermoso, J.A., Ibanez, L.I., Santos, J.

To be published.

Macromolecule Content

Total Structure Weight: 26.59 kDa
Atom Count: 2,042
Modeled Residue Count: 242
Deposited Residue Count: 242
Unique protein chains: 2

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Frataxin mature form	A	114	Homo sapiens	Mutation(s): 0 Gene Names: FXN, FRDA, X25 EC: 1.16.3.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q16595 (Homo sapiens) Explore Q16595 Go to UniProtKB: Q16595
PHAROS: Q16595 GTEx: ENSG00000165060
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q16595
Sequence Annotations Expand
Reference Sequence

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Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Camelid Nanobody 6B1	B [auth C]	128	Lama glama	Mutation(s): 0

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.76 Å
R-Value Free: 0.175 (Depositor), 0.250 (DCC)
R-Value Work: 0.151 (Depositor), 0.235 (DCC)

Space Group: P 6₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 97.253	α = 90
b = 97.253	β = 90
c = 128.105	γ = 120

Software Package:

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

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2025-12-24

Deposition Author(s):

Garay-Alvarez, A.

Funding Organization	Location	Grant Number
Agencia Estatal de Investigacion (AEI)	Spain	PID2020-115331GB-I00

Revision History (Full details and data files)

Version 1.0: 2025-12-24
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.