7MQK

AAC(3)-IIIa in complex with CoA and sisomicin

PDB DOI: https://doi.org/10.2210/pdb7MQK/pdb

Classification: TRANSFERASE
Organism(s): Pseudomonas aeruginosa
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2021-05-05 Released: 2022-07-06
Deposition Author(s): Zielinski, M., Berghuis, A.M.
Funding Organization(s): Canadian Institutes of Health Research (CIHR)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.60 Å
R-Value Free: 0.204
R-Value Work: 0.179
R-Value Observed: 0.180

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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

Literature

Structural elucidation of substrate-bound aminoglycoside acetyltransferase (3)-IIIa.

Zielinski, M., Blanchet, J., Hailemariam, S., Berghuis, A.M.

(2022) PLoS One 17: e0269684-e0269684

PubMed: 35921328 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1371/journal.pone.0269684
Primary Citation of Related Structures:
7MQK, 7MQL, 7MQM

PubMed Abstract:
Canonical aminoglycosides are a large group of antibiotics, where the part of chemical diversity stems from the substitution of the neamine ring system on positions 5 and 6. Certain aminoglycoside modifying enzymes can modify a broad range of 4,5- and 4,6-disubstituted aminoglycosides, with some as many as 15. This study presents the structural and kinetic results describing a promiscuous aminoglycoside acetyltransferase AAC(3)-IIIa. This enzyme has been crystallized in ternary complex with coenzyme A and 4,5- and 4,6-disubstituted aminoglycosides. We have followed up this work with kinetic characterization utilizing a panel of diverse aminoglycosides, including a next-generation aminoglycoside, plazomicin. Lastly, we observed an alternative binding mode of gentamicin in the aminoglycoside binding site, which was proven to be a crystallographic artifact based on mutagenesis.

Organizational Affiliation

Department of Biochemistry, McGill University, Montréal, Québec, Canada.

Macromolecule Content

Total Structure Weight: 124.74 kDa
Atom Count: 9,825
Modelled Residue Count: 1,042
Deposited Residue Count: 1,096
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Aminoglycoside N(3)-acetyltransferase III	A, B, C, D	274	Pseudomonas aeruginosa	Mutation(s): 0 Gene Names: aacC3 EC: 2.3.1.81
UniProt
Find proteins for P29808 (Pseudomonas aeruginosa) Explore P29808 Go to UniProtKB: P29808
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P29808
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
COA (Subject of Investigation/LOI) Query on COA Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain H [auth B] SDF format, chain K [auth C] SDF format, chain M [auth D] MOL2 format, chain F [auth A] MOL2 format, chain H [auth B] MOL2 format, chain K [auth C] MOL2 format, chain M [auth D]	F [auth A], H [auth B], K [auth C], M [auth D]	COENZYME A C₂₁ H₃₆ N₇ O₁₆ P₃ S RGJOEKWQDUBAIZ-IBOSZNHHSA-N		Interactions Focus chain F [auth A] Focus chain H [auth B] Focus chain K [auth C] Focus chain M [auth D] Interactions & Density Focus chain F [auth A] Focus chain H [auth B] Focus chain K [auth C] Focus chain M [auth D]
SIS (Subject of Investigation/LOI) Query on SIS Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain G [auth B] SDF format, chain J [auth C] SDF format, chain L [auth D] MOL2 format, chain E [auth A] MOL2 format, chain G [auth B] MOL2 format, chain J [auth C] MOL2 format, chain L [auth D]	E [auth A], G [auth B], J [auth C], L [auth D]	(1S,2S,3R,4S,6R)-4,6-diamino-3-{[(2S,3R)-3-amino-6-(aminomethyl)-3,4-dihydro-2H-pyran-2-yl]oxy}-2-hydroxycyclohexyl 3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranoside C₁₉ H₃₇ N₅ O₇ URWAJWIAIPFPJE-YFMIWBNJSA-N		Interactions Focus chain E [auth A] Focus chain G [auth B] Focus chain J [auth C] Focus chain L [auth D] Interactions & Density Focus chain E [auth A] Focus chain G [auth B] Focus chain J [auth C] Focus chain L [auth D]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain I [auth B] MOL2 format, chain I [auth B]	I [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain I [auth B] Interactions & Density Focus chain I [auth B]