5SW5

Crystal structure of native catalase-peroxidase KatG at pH7.5

PDB DOI: https://doi.org/10.2210/pdb5SW5/pdb
Entry: 5SW5 supersedes: 2B2Q

Classification: OXIDOREDUCTASE
Organism(s): Burkholderia pseudomallei 1710b
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2016-08-08 Released: 2016-08-24
Deposition Author(s): Loewen, P.C.
Funding Organization(s): Natural Sciences and Engineering Research Council (NSERC, Canada)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.05 Å
R-Value Free: 0.184
R-Value Work: 0.149
R-Value Observed: 0.150

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.4 of the entry. See complete history.

Literature

A molecular switch and electronic circuit modulate catalase activity in catalase-peroxidases.

Carpena, X., Wiseman, B., Deemagarn, T., Singh, R., Switala, J., Ivancich, A., Fita, I., Loewen, P.C.

(2005) EMBO Rep 6: 1156-1162

PubMed: 16211084 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1038/sj.embor.7400550
Primary Citation of Related Structures:
5SW4, 5SW5, 5SW6, 5SX0

PubMed Abstract:
The catalase reaction of catalase-peroxidases involves catalase-specific features built into a peroxidase core. An arginine, 20 A from the active-site heme, acts as a molecular switch moving between two conformations, one that activates heme oxidation and one that activates oxoferryl heme reduction by H(2)O(2), facilitating the catalatic pathway in a peroxidase. The influence of the arginine is imparted to the heme through its association with or dissociation from a tyrosinate that modulates reactivity through a Met-Tyr-Trp crosslinked adduct and a pi electron interaction of the heme with the adduct Trp.

Organizational Affiliation

Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada.

Macromolecule Content

Total Structure Weight: 161.51 kDa
Atom Count: 12,638
Modelled Residue Count: 1,426
Deposited Residue Count: 1,456
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Catalase-peroxidase	A, B	728	Burkholderia pseudomallei 1710b	Mutation(s): 0 Gene Names: katG, BURPS1710b_3366 EC: 1.11.1.21
UniProt
Find proteins for Q3JNW6 (Burkholderia pseudomallei (strain 1710b)) Go to UniProtKB: Q3JNW6
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HEM Query on HEM Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain L [auth B] MOL2 format, chain C [auth A] MOL2 format, chain L [auth B] mmCIF format, chain C [auth A] mmCIF format, chain L [auth B]	C [auth A], L [auth B]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain C [auth A] Focus chain L [auth B]
TRS Query on TRS Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] SDF format, chain Q [auth B] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] MOL2 format, chain Q [auth B] mmCIF format, chain I [auth A] mmCIF format, chain J [auth A] mmCIF format, chain K [auth A] mmCIF format, chain Q [auth B]	I [auth A], J [auth A], K [auth A], Q [auth B]	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C₄ H₁₂ N O₃ LENZDBCJOHFCAS-UHFFFAOYSA-O		Interactions Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain Q [auth B]
MPD Query on MPD Download Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain P [auth B] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain P [auth B] mmCIF format, chain G [auth A] mmCIF format, chain H [auth A] mmCIF format, chain P [auth B]	G [auth A], H [auth A], P [auth B]	(4S)-2-METHYL-2,4-PENTANEDIOL C₆ H₁₄ O₂ SVTBMSDMJJWYQN-YFKPBYRVSA-N		Interactions Focus chain G [auth A] Focus chain H [auth A] Focus chain P [auth B]
PO4 Query on PO4 Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain O [auth B] MOL2 format, chain F [auth A] MOL2 format, chain O [auth B] mmCIF format, chain F [auth A] mmCIF format, chain O [auth B]	F [auth A], O [auth B]	PHOSPHATE ION O₄ P NBIIXXVUZAFLBC-UHFFFAOYSA-K		Interactions Focus chain F [auth A] Focus chain O [auth B]
OXY Query on OXY Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain N [auth B] MOL2 format, chain E [auth A] MOL2 format, chain N [auth B] mmCIF format, chain E [auth A] mmCIF format, chain N [auth B]	E [auth A], N [auth B]	OXYGEN MOLECULE O₂ MYMOFIZGZYHOMD-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain N [auth B]
NA Query on NA Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain M [auth B] MOL2 format, chain D [auth A] MOL2 format, chain M [auth B] mmCIF format, chain D [auth A] mmCIF format, chain M [auth B]	D [auth A], M [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain M [auth B]

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TOX Query on TOX	A, B	L-PEPTIDE LINKING	C₁₁ H₁₂ N₂ O₄		TRP

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.05 Å
R-Value Free: 0.184
R-Value Work: 0.149
R-Value Observed: 0.150
Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 100.343	α = 90
b = 114.851	β = 90
c = 174.86	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

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Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2016-08-24

Deposition Author(s):

Loewen, P.C.

This entry supersedes: 2B2Q

Funding Organization	Location	Grant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)	Canada	D9600

Revision History (Full details and data files)

Version 1.0: 2016-08-24
Type: Initial release
Version 1.1: 2017-09-27
Changes: Author supporting evidence, Derived calculations, Structure summary
Version 1.2: 2020-01-08
Changes: Author supporting evidence
Version 1.3: 2023-10-04
Changes: Data collection, Database references, Derived calculations, Refinement description
Version 1.4: 2023-11-15
Changes: Data collection