4CXQ

Mycobaterium tuberculosis transaminase BioA complexed with substrate KAPA

PDB DOI: https://doi.org/10.2210/pdb4CXQ/pdb
Entry: 4CXQ supersedes: 4MQN

Classification: TRANSFERASE
Organism(s): Mycobacterium tuberculosis
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2014-04-08 Released: 2014-04-23
Deposition Author(s): Dai, R., Wilson, D.J., Geders, T.W., Aldrich, C.C., Finzel, B.C.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.80 Å
R-Value Free: 0.195
R-Value Work: 0.155
R-Value Observed: 0.157

Starting Model: experimental
View more details

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.3 of the entry. See complete history.

Literature

Inhibition of Mycobacterium Tuberculosis Transaminase Bioa by Aryl Hydrazines and Hydrazides.

Dai, R., Wilson, D.J., Geders, T.W., Aldrich, C.C., Finzel, B.C.

(2014) Chembiochem 15: 575

PubMed: 24482078 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1002/cbic.201300748
Primary Citation of Related Structures:
4CXQ, 4CXR, 4MQP, 4MQQ, 4MQR

PubMed Abstract:
7,8-Diaminopelargonic acid synthase (BioA) of Mycobacterium tuberculosis is a recently validated target for therapeutic intervention in the treatment of tuberculosis (TB). Using biophysical fragment screening and structural characterization of compounds, we have identified a potent aryl hydrazine inhibitor of BioA that reversibly modifies the pyridoxal-5'-phosphate (PLP) cofactor, forming a stable quinonoid. Analogous hydrazides also form covalent adducts that can be observed crystallographically but are incapable of inactivating the enzyme. In the X-ray crystal structures, small molecules induce unexpected conformational remodeling in the substrate binding site. We compared these conformational changes to those induced upon binding of the substrate (7-keto-8-aminopelargonic acid), and characterized the inhibition kinetics and the X-ray crystal structures of BioA with the hydrazine compound and analogues to unveil the mechanism of this reversible covalent modification.

Organizational Affiliation

Department of Medicinal Chemistry, University of Minnesota, 308 Harvard St. SE, Minneapolis, MN 55455 (USA).

Macromolecule Content

Total Structure Weight: 98.34 kDa
Atom Count: 7,167
Modelled Residue Count: 853
Deposited Residue Count: 914
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADENOSYLMETHIONINE-8-AMINO-7-OXONONANOATE AMINOTRANSFERASE	A, B	457	Mycobacterium tuberculosis	Mutation(s): 0 EC: 2.6.1.62
UniProt
Find proteins for P9WQ81 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WQ81 Go to UniProtKB: P9WQ81
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P9WQ81
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PLP Query on PLP Download Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain H [auth B] MOL2 format, chain C [auth A] MOL2 format, chain H [auth B] mmCIF format, chain C [auth A] mmCIF format, chain H [auth B]	C [auth A], H [auth B]	PYRIDOXAL-5'-PHOSPHATE C₈ H₁₀ N O₆ P NGVDGCNFYWLIFO-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain H [auth B] Interactions & Density Focus chain C [auth A] Focus chain H [auth B]
KAP Query on KAP Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain I [auth B] MOL2 format, chain D [auth A] MOL2 format, chain I [auth B] mmCIF format, chain D [auth A] mmCIF format, chain I [auth B]	D [auth A], I [auth B]	7-KETO-8-AMINOPELARGONIC ACID C₉ H₁₇ N O₃ GUAHPAJOXVYFON-ZETCQYMHSA-N		Interactions Focus chain D [auth A] Focus chain I [auth B] Interactions & Density Focus chain D [auth A] Focus chain I [auth B]
PEG Query on PEG Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain J [auth B] MOL2 format, chain E [auth A] MOL2 format, chain J [auth B] mmCIF format, chain E [auth A] mmCIF format, chain J [auth B]	E [auth A], J [auth B]	DI(HYDROXYETHYL)ETHER C₄ H₁₀ O₃ MTHSVFCYNBDYFN-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain J [auth B] Interactions & Density Focus chain E [auth A] Focus chain J [auth B]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain K [auth B] SDF format, chain F [auth A] SDF format, chain G [auth A] MOL2 format, chain K [auth B] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] mmCIF format, chain K [auth B] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A]	F [auth A], G [auth A], K [auth B]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain F [auth A] Focus chain G [auth A] Focus chain K [auth B] Interactions & Density Focus chain F [auth A] Focus chain G [auth A] Focus chain K [auth B]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.80 Å
R-Value Free: 0.195
R-Value Work: 0.155
R-Value Observed: 0.157
Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 62.553	α = 90
b = 66.149	β = 90
c = 205.294	γ = 90

Software Package:

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

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment

Entry History

Deposition Data

Released Date: 2014-04-23

Deposition Author(s):

This entry supersedes: 4MQN

Revision History (Full details and data files)

Version 1.0: 2014-04-23
Type: Initial release
Version 1.1: 2019-01-30
Changes: Data collection, Experimental preparation, Other
Version 1.2: 2019-02-06
Changes: Data collection, Experimental preparation
Version 1.3: 2023-12-20
Changes: Data collection, Database references, Derived calculations, Other, Refinement description