CbxX/CfxQ, monofunctional (IPR000470)

Short name: CbxX/CfqX_mono

Overlapping homologous superfamilies

Family relationships

  • CbxX/CfxQ (IPR000641)
    • CbxX/CfxQ, monofunctional (IPR000470)


Proteins in this family are now designated CbbX. Some previously were CfxQ (carbon fixation Q). Its gene is often found immmediately downstream of the Rubisco large and small chain genes, and it is suggested to be necessary for Rubisco expression. CbbX has been shown to be necessary for photoautotrophic growth. The Cfx genes in Ralstonia eutropha (Alcaligenes eutrophus) encode a number of Calvin cycle enzymes [PMID: 1429456]. The observed sizes of two of the gene products, CfxX and CfxY, are 35 kDa and 27 kDa respectively [PMID: 1429456]. No functions could be assigned to CfxX and CfxY. These proteins show a high degree of similarity to the Bacillus subtilis stage V sporulation protein K [PMID: 1787791].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0005524 ATP binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.