9I7O | pdb_00009i7o

Beta-lactoglobulin complex with retinol

PDB DOI: https://doi.org/10.2210/pdb9I7O/pdb

Classification: TRANSPORT PROTEIN
Organism(s): Bos taurus
Mutation(s): Yes

Deposited: 2025-01-31 Released: 2026-02-18
Deposition Author(s): Figueiredo, M.R.F., Pereira, P.J.B., Martins, P.M.M.
Funding Organization(s): Fundacao para a Ciencia e a Tecnologia

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Free:
0.197 (Depositor), 0.197 (DCC)
R-Value Work:
0.176 (Depositor), 0.176 (DCC)
R-Value Observed:
0.177 (Depositor)

Starting Model: experimental
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Ligand Structure Quality Assessment

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Literature

Beta-lactoglobulin complex with retinol

Figueiredo, M.R.F., Pereira, P.J.B., Martins, P.M.M.

To be published.

Macromolecule Content

Total Structure Weight: 20.28 kDa
Atom Count: 1,303
Modeled Residue Count: 159
Deposited Residue Count: 180
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-lactoglobulin	A	178	Bos taurus	Mutation(s): 2
UniProt
Find proteins for P02754 (Bos taurus) Explore P02754 Go to UniProtKB: P02754
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P02754
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
RTL (Subject of Investigation/LOI) Query on RTL Download:Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	RETINOL C₂₀ H₃₀ O FPIPGXGPPPQFEQ-OVSJKPMPSA-N		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]

Binding Affinity Annotations
ID	Source	Binding Affinity
RTL	BindingDB: 9I7O	Kd: 36 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Free: 0.197 (Depositor), 0.197 (DCC)
R-Value Work: 0.176 (Depositor), 0.176 (DCC)
R-Value Observed: 0.177 (Depositor)

Diffraction Data:

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.907	α = 90
b = 53.907	β = 90
c = 112.579	γ = 120

Software Package:

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

Structure Validation

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Ligand Structure Quality Assessment

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-02-18

Deposition Author(s):

Figueiredo, M.R.F.

Pereira, P.J.B.

Martins, P.M.M.

Funding Organization	Location	Grant Number
Fundacao para a Ciencia e a Tecnologia	Portugal	2023.00318.BD

Revision History (Full details and data files)

Version 1.0: 2026-02-18
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.