Native cystathionine beta-synthase of Mycobacterium tuberculosis.

Experimental Data Snapshot

  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

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S-Adenosylmethionine-responsive cystathionine beta-synthase modulates sulfur metabolism and redox balance in Mycobacterium tuberculosis.

Bandyopadhyay, P.Pramanick, I.Biswas, R.Ps, S.Sreedharan, S.Singh, S.Rajmani, R.S.Laxman, S.Dutta, S.Singh, A.

(2022) Sci Adv 8: eabo0097-eabo0097

  • DOI: https://doi.org/10.1126/sciadv.abo0097
  • Primary Citation of Related Structures:  
    7XNZ, 7XOH, 7XOY

  • PubMed Abstract: 

    Methionine and cysteine metabolisms are important for the survival and pathogenesis of Mycobacterium tuberculosis ( Mtb ). The transsulfuration pathway converts methionine to cysteine and represents an important link between antioxidant and methylation metabolism in diverse organisms. Using a combination of biochemistry and cryo-electron microscopy, we characterized the first enzyme of the transsulfuration pathway, cystathionine β-synthase ( Mtb Cbs) in Mtb . We demonstrated that Mtb Cbs is a heme-less, pyridoxal-5'-phosphate-containing enzyme, allosterically activated by S -adenosylmethionine (SAM). The atomic model of Mtb Cbs in its native and SAM-bound conformations revealed a unique mode of SAM-dependent allosteric activation. Further, SAM stabilized Mtb Cbs by sterically occluding proteasomal degradation, which was crucial for supporting methionine and redox metabolism in Mtb . Genetic deficiency of Mtb Cbs reduced Mtb survival upon homocysteine overload in vitro, inside macrophages, and in mice coinfected with HIV. Thus, the Mtb Cbs-SAM axis constitutes an important mechanism of coordinating sulfur metabolism in Mtb .

  • Organizational Affiliation

    Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, Karnataka 560012, India.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative cystathionine beta-synthase Rv1077A [auth B],
B [auth A],
478Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: cbsRv1077
Find proteins for P9WP51 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WP51 
Go to UniProtKB:  P9WP51
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WP51
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Department of Biotechnology (DBT, India)IndiaIA/S/16/2/502700
Department of Biotechnology (DBT, India)IndiaBT/PR13522/COE/34/27/2015
Department of Biotechnology (DBT, India)IndiaBT/PR29098/Med/29/1324/2018
Department of Biotechnology (DBT, India)IndiaBT/HRD/NBA/39/07/2018-19
Department of Biotechnology (DBT, India)IndiaBT/PR39308/DRUG/134/86/2021
Department of Biotechnology (DBT, India)India22-0905-0006-05-987-436
Science and Engineering Research Board (SERB)IndiaSB/S2/RJN-145/2015
Science and Engineering Research Board (SERB)IndiaSERB-EMR/2016/000608
Department of Biotechnology (DBT, India)IndiaBT/PR25580/BRB/10/1619/2017
Department of Biotechnology (DBT, India)IndiaIA/E/19/1/504978
Department of Biotechnology (DBT, India)IndiaBT/INF/22/SP22844/2017
Department of Science & Technology (DST, India)IndiaSR/FST/LSII-039/2015
Department of Biotechnology (DBT, India)IndiaDBT/PR12422/MED/31/287/2014

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-25
    Type: Initial release
  • Version 1.1: 2022-12-07
    Changes: Database references