9KCT | pdb_00009kct

Crystal structure of Tagatose 4-epimerase from Thermoprotei archaeon

PDB DOI: https://doi.org/10.2210/pdb9KCT/pdb

Classification: ISOMERASE
Organism(s): Thermoprotei archaeon
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2024-11-02 Released: 2025-11-05
Deposition Author(s): Chen, J., Luo, G., Huang, Z., Ni, D., Zhu, Y., Xu, W., Zhang, W., Mu, W.
Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.09 Å
R-Value Free:
0.232 (Depositor), 0.241 (DCC)
R-Value Work:
0.183 (Depositor), 0.196 (DCC)
R-Value Observed:
0.186 (Depositor)

Starting Model: in silico
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This is version 1.0 of the entry. See complete history.

Literature

Crystal structure of Tagatose 4-epimerase from Thermoprotei archaeon

Chen, J., Luo, G., Huang, Z., Ni, D., Zhu, Y., Xu, W., Rao, Y., Mu, W.

To be published.

Macromolecule Content

Total Structure Weight: 58.07 kDa
Atom Count: 4,214
Modeled Residue Count: 491
Deposited Residue Count: 500
Unique protein chains: 1

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ISOMERASE	A	500	Thermoprotei archaeon	Mutation(s): 0 Gene Names: DRJ37_03570

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
1PG Query on 1PG Download:Ideal Coordinates CCD File SDF format, chain M [auth A] MOL2 format, chain M [auth A] mmCIF format, chain M [auth A]	M [auth A]	2-(2-{2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL C₁₁ H₂₄ O₆ SLNYBUIEAMRFSZ-UHFFFAOYSA-N		Interactions Focus chain M [auth A] Interactions & Density Focus chain M [auth A]
PEG Query on PEG Download:Ideal Coordinates CCD File SDF format, chain L [auth A] MOL2 format, chain L [auth A] mmCIF format, chain L [auth A]	L [auth A]	DI(HYDROXYETHYL)ETHER C₄ H₁₀ O₃ MTHSVFCYNBDYFN-UHFFFAOYSA-N		Interactions Focus chain L [auth A] Interactions & Density Focus chain L [auth A]
EDO Query on EDO Download:Ideal Coordinates CCD File SDF format, chain K [auth A] SDF format, chain J [auth A] SDF format, chain I [auth A] SDF format, chain H [auth A] SDF format, chain G [auth A] SDF format, chain F [auth A] SDF format, chain E [auth A] SDF format, chain D [auth A] SDF format, chain C [auth A] SDF format, chain B [auth A] MOL2 format, chain K [auth A] MOL2 format, chain J [auth A] MOL2 format, chain I [auth A] MOL2 format, chain H [auth A] MOL2 format, chain G [auth A] MOL2 format, chain F [auth A] MOL2 format, chain E [auth A] MOL2 format, chain D [auth A] MOL2 format, chain C [auth A] MOL2 format, chain B [auth A] mmCIF format, chain K [auth A] mmCIF format, chain J [auth A] mmCIF format, chain I [auth A] mmCIF format, chain H [auth A] mmCIF format, chain G [auth A] mmCIF format, chain F [auth A] mmCIF format, chain E [auth A] mmCIF format, chain D [auth A] mmCIF format, chain C [auth A] mmCIF format, chain B [auth A]	B [auth A] C [auth A] D [auth A] E [auth A] F [auth A] B [auth A], C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Interactions & Density Focus chain B [auth A] Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A]

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP Query on SEP	A	L-PEPTIDE LINKING	C₃ H₈ N O₆ P		SER

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.09 Å
R-Value Free: 0.232 (Depositor), 0.241 (DCC)
R-Value Work: 0.183 (Depositor), 0.196 (DCC)
R-Value Observed: 0.186 (Depositor)

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 87.19	α = 90
b = 75.7	β = 100.71
c = 91.08	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: 2025-11-05

Deposition Author(s):

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	2022YFC2104900

Revision History (Full details and data files)

Version 1.0: 2025-11-05
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.