9D63 | pdb_00009d63

Crystal structure of Human Galectin-3 CRD in complex with Galactose (Galactose soak)

PDB DOI: https://doi.org/10.2210/pdb9D63/pdb

Classification: SUGAR BINDING PROTEIN
Organism(s): Homo sapiens
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2024-08-14 Released: 2026-03-18
Deposition Author(s): dos Santos, L.V., Dias, I.P., Mazepa, E., Minella, T.F., Baruffi, M.R., Mestriner, L., Nascimento, A.F.Z., Albuquerque, L.J.C., Mischiatti, K.L., Winnischofer, S.M.B., Amaral, S.S., Silveira, J.L.M., Picheth, G.F.
Funding Organization(s): Brazilian National Council for Scientific and Technological Development (CNPq), Coordination for the Improvement of Higher Education Personnel

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.15 Å
R-Value Free:
0.137 (Depositor), 0.137 (DCC)
R-Value Work:
0.118 (Depositor), 0.118 (DCC)
R-Value Observed:
0.119 (Depositor)

Starting Model: experimental
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Ligand Structure Quality Assessment

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Literature

Exploring the interactive effect of pectins with galectin-3 to reduce the viability of T98G glioblastoma cell lineage

dos Santos, L.V., Dias, I.P., Mazepa, E., Minella, T.F., Baruffi, M.R., Mestriner, L., Nascimento, A.F.Z., Albuquerque, L.J.C., Mischiatti, K.L., Winnischofer, S.M.B., Amaral, S.S., Silveira, J.L.M., Picheth, G.F.

To be published.

Macromolecule Content

Total Structure Weight: 16.39 kDa
Atom Count: 1,395
Modeled Residue Count: 139
Deposited Residue Count: 139
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Galectin-3	A	139	Homo sapiens	Mutation(s): 0 Gene Names: LGALS3, MAC2
UniProt & NIH Common Fund Data Resources
Find proteins for P17931 (Homo sapiens) Explore P17931 Go to UniProtKB: P17931
PHAROS: P17931 GTEx: ENSG00000131981
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P17931
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

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Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
beta-D-galactopyranose-(1-4)-beta-D-glucopyranose	B	2		N/A	Interactions Focus chain B Interactions & Density Focus chain B
Glycosylation Resources
GlyTouCan: G84224TW GlyCosmos: G84224TW GlyGen: G84224TW

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
GAL (Subject of Investigation/LOI) Query on GAL Download:Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	beta-D-galactopyranose C₆ H₁₂ O₆ WQZGKKKJIJFFOK-FPRJBGLDSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
CL Query on CL 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]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.15 Å
R-Value Free: 0.137 (Depositor), 0.137 (DCC)
R-Value Work: 0.118 (Depositor), 0.118 (DCC)
R-Value Observed: 0.119 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.886	α = 90
b = 57.798	β = 90
c = 62.573	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PHASER	phasing
XDS	data scaling
XDS	data reduction
MxCuBE	data collection

Structure Validation

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Ligand Structure Quality Assessment

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-03-18

Deposition Author(s):

Funding Organization	Location	Grant Number
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	476950/2013-9
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	308296/2015-0
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	309225/2018-3
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	312827/2021-0
Brazilian National Council for Scientific and Technological Development (CNPq)	Brazil	406973/2022-9
Coordination for the Improvement of Higher Education Personnel	Brazil	1798682