opuCA

168

glycine betaine/carnitine/choline/arsenobetaine/arsenocholine ABC transporter (ATP-binding protein)

Locus: BSU_33830

Molecular weight: 43.09 kDa

Isoelectric point: 6.55

Protein length: 380 aa

Gene length: 1143 bp

Function: compatible solute transport

Product: glycine betaine/carnitine/choline/arsenobetaine/arsenocholine ABC transporter (ATP-binding protein)

Essential: no

Synonyms: opuCA, yvbE

Genomic Context

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List of homologs in different organisms, belongs to COG1125 (Galperin et al., 2021)

Gene

Coordinates: 3,469,860  3,471,002

The protein

Catalyzed reaction/ biological activity

• uptake of glycine betaine, arsenocholine and arsenobetaine PubMed

Protein family

• ABC transporter superfamily (according to UniProt)

Domains

• ABC transporter domain (aa 2-236) (according to UniProt)
• 2 CBS domains (aa 255-314, aa 315-373) (according to UniProt)

Structure

• 2IT1 (PDB) (from Pyrococcus horikoshii, 35% identity)
• 5KS7 (PDB) (CBS domains from L. monocytogenes, with c-di-AMP bound) PubMed
• O34992 (AlphaFold)

Effectors of protein activity

• binds c-di-AMP, which likely inhibits uptake activity PubMed

Paralogous protein(s)

• OpuAA, OpuBA

Localization

• associated to the membrane (via OpuCB-OpuCD) PubMed

Expression and Regulation

Operons

• Genes: opuCA-opuCB-opuCC-opuCD

  Description: PubMed

  Regulation

  • induced by salt stress PubMed
  • induced in the absence of RnpM PubMed

  Regulatory mechanism

  • OpcR: repression, (sterical interference with RNA polymerase access) PubMed, in opcR regulon
  • RemA: activation, PubMed, in remA regulon
  • RnpM: unknown, PubMed, in rnpM regulon

Biological materials

Mutant

• BKE33830 (opuCA::erm  trpC2) available at BGSC,  PubMed, upstream reverse: _UP1_CAATCCGTGCACCTCCGCAG,  downstream forward: _UP4_TGACCAGGGGAGGAGCTCTT
• BKK33830 (opuCA::kan  trpC2) available at BGSC,  PubMed, upstream reverse: _UP1_CAATCCGTGCACCTCCGCAG,  downstream forward: _UP4_TGACCAGGGGAGGAGCTCTT

Expression vectors

• pGP2939 (N-terminal His-tag, purification from E. coli, in pWH844), available in Jörg Stülke's lab

References

Reviews

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Original Publications

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