4FFC

Crystal structure of a 4-aminobutyrate aminotransferase (GabT) from Mycobacterium abscessus

PDB DOI: 10.2210/pdb4FFC/pdb

Classification: TRANSFERASE
Organism(s): Mycobacteroides abscessus ATCC 19977
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2012-05-31 Released: 2012-06-13
Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.80 Å
R-Value Free: 0.167
R-Value Work: 0.138
R-Value Observed: 0.140

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Increasing the structural coverage of tuberculosis drug targets.

Baugh, L., Phan, I., Begley, D.W., Clifton, M.C., Armour, B., Dranow, D.M., Taylor, B.M., Muruthi, M.M., Abendroth, J., Fairman, J.W., Fox, D., Dieterich, S.H., Staker, B.L., Gardberg, A.S., Choi, R., Hewitt, S.N., Napuli, A.J., Myers, J., Barrett, L.K., Zhang, Y., Ferrell, M., Mundt, E., Thompkins, K., Tran, N., Lyons-Abbott, S., Abramov, A., Sekar, A., Serbzhinskiy, D., Lorimer, D., Buchko, G.W., Stacy, R., Stewart, L.J., Edwards, T.E., Van Voorhis, W.C., Myler, P.J.

(2015) Tuberculosis (Edinb) 95: 142-148

PubMed: 25613812 Search on PubMedSearch on PubMed Central
DOI: 10.1016/j.tube.2014.12.003
Primary Citation of Related Structures:
3GVC, 3GVG, 3GWC, 3H7F, 3H81, 3HE2, 3HWI, 3HWK, 3HZG, 3ICO, 3KHP, 3LLS, 3MOY, 3MPZ, 3MYB, 3NDN, 3NDO, 3NF4, 3NG3, 3NJD, 3NWO, 3O0M, 3O38, 3OC6, 3OC7, 3OI9, 3OKS, 3OME, 3P0T, 3P2Y, 3P4I, 3P4T, 3P5M, 3P85, 3PE8, 3PK0, 3PPI, 3PZY, 3Q1T, 3Q8N, 3QBP, 3QDF, 3QHA, 3QIV, 3QK8, 3QKA, 3QLJ, 3QMJ, 3QRE, 3QUA

PubMed Abstract:

High-resolution three-dimensional structures of essential Mycobacterium tuberculosis (Mtb) proteins provide templates for TB drug design, but are available for only a small fraction of the Mtb proteome. Here we evaluate an intra-genus "homolog-rescue" strategy to increase the structural information available for TB drug discovery by using mycobacterial homologs with conserved active sites. Of 179 potential TB drug targets selected for x-ray structure determination, only 16 yielded a crystal structure. By adding 1675 homologs from nine other mycobacterial species to the pipeline, structures representing an additional 52 otherwise intractable targets were solved. To determine whether these homolog structures would be useful surrogates in TB drug design, we compared the active sites of 106 pairs of Mtb and non-TB mycobacterial (NTM) enzyme homologs with experimentally determined structures, using three metrics of active site similarity, including superposition of continuous pharmacophoric property distributions. Pair-wise structural comparisons revealed that 19/22 pairs with >55% overall sequence identity had active site Cα RMSD <1 Å, >85% side chain identity, and ≥80% PSAPF (similarity based on pharmacophoric properties) indicating highly conserved active site shape and chemistry. Applying these results to the 52 NTM structures described above, 41 shared >55% sequence identity with the Mtb target, thus increasing the effective structural coverage of the 179 Mtb targets over three-fold (from 9% to 32%). The utility of these structures in TB drug design can be tested by designing inhibitors using the homolog structure and assaying the cognate Mtb enzyme; a promising test case, Mtb cytidylate kinase, is described. The homolog-rescue strategy evaluated here for TB is also generalizable to drug targets for other diseases.

Organizational Affiliation:

Seattle Structural Genomics Center for Infectious Disease, United States; Seattle Biomedical Research Institute, 307 Westlake Ave N, Suite 500, Seattle, WA 98109, United States; Department of Global Health, University of Washington, Box 359931, Seattle, WA, 98195, United States; Department of Biomedical Informatics and Medical Education, University of Washington, Box 358047, Seattle, WA 98195, United States. Electronic address: peter.myler@seattlebiomed.org.

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
4-aminobutyrate aminotransferase (GabT)	A, B, C, D	453	Mycobacteroides abscessus ATCC 19977	Mutation(s): 0 Gene Names: MAB_4207
UniProt
Find proteins for B1MIQ9 (Mycobacteroides abscessus (strain ATCC 19977 / DSM 44196 / CIP 104536 / JCM 13569 / NCTC 13031 / TMC 1543)) Explore B1MIQ9 Go to UniProtKB: B1MIQ9
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	B1MIQ9
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth C] SDF format, chain H [auth C] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth C] MOL2 format, chain H [auth C]	E [auth A], F [auth A], G [auth C], H [auth C]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Ligand Interaction