7MFM

Glutamate synthase, glutamate dehydrogenase counter-enzyme complex

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

A counter-enzyme complex regulates glutamate metabolism in Bacillus subtilis.

Jayaraman, V., Lee, D.J., Elad, N., Vimer, S., Sharon, M., Fraser, J.S., Tawfik, D.S.

(2022) Nat Chem Biol 18: 161-170

  • DOI: 10.1038/s41589-021-00919-y
  • Primary Citation of Related Structures:  
    7MFM, 7MFT

  • PubMed Abstract: 

    • Multi-enzyme assemblies composed of metabolic enzymes catalyzing sequential reactions are being increasingly studied. Here, we report the discovery of a 1.6 megadalton multi-enzyme complex from Bacillus subtilis composed of two enzymes catalyzing opposite ('counter-enzymes') rather than sequential reactions: glutamate synthase (GltAB) and glutamate dehydrogenase (GudB), which make and break glutamate, respectively ...

    Multi-enzyme assemblies composed of metabolic enzymes catalyzing sequential reactions are being increasingly studied. Here, we report the discovery of a 1.6 megadalton multi-enzyme complex from Bacillus subtilis composed of two enzymes catalyzing opposite ('counter-enzymes') rather than sequential reactions: glutamate synthase (GltAB) and glutamate dehydrogenase (GudB), which make and break glutamate, respectively. In vivo and in vitro studies show that the primary role of complex formation is to inhibit the activity of GudB. Using cryo-electron microscopy, we elucidated the structure of the complex and the molecular basis of inhibition of GudB by GltAB. The complex exhibits unusual oscillatory progress curves and is necessary for both planktonic growth, in glutamate-limiting conditions, and for biofilm growth, in glutamate-rich media. The regulation of a key metabolic enzyme by complexing with its counter enzyme may thus enable cell growth under fluctuating glutamate concentrations.

    Organizational Affiliation: 

    Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamate dehydrogenase424Bacillus subtilisMutation(s): 0 
Gene Names: gudB, B4122_2172, ETA10_11605, ETK61_12750, GII81_12565, SC09_Contig24orf00413, Bateq7PJ16_2553
UniProt
Find proteins for A0A0C3GZC9 (Bacillus subtilis)
Explore A0A0C3GZC9 
Go to UniProtKB:  A0A0C3GZC9
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UniProt GroupA0A0C3GZC9
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamate synthase (NADPH) large chainB [auth G],
C [auth H]		1520Bacillus subtilisMutation(s): 0 
Gene Names: B4417_0011
UniProt
Find proteins for A0A164XVV7 (Bacillus subtilis)
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Go to UniProtKB:  A0A164XVV7
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UniProt GroupA0A164XVV7
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamate synthase (NADPH) small chainD [auth I],
E [auth J]		524Bacillus subtilisMutation(s): 1 
Gene Names: B4417_0010
UniProt
Find proteins for A0A164XVU4 (Bacillus subtilis)
Explore A0A164XVU4 
Go to UniProtKB:  A0A164XVU4
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UniProt GroupA0A164XVU4
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Israel Science FoundationIsrael2575/20
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM123159

Revision History  (Full details and data files)

  • Version 1.0: 2022-01-05
    Type: Initial release
  • Version 1.1: 2022-02-16
    Changes: Database references