ROSMUCR transcriptional regulator (IPR008807)

Short name: ROS_MUCR

Overlapping homologous superfamilies

Family relationships



This family consists of several ROS/MUCR transcriptional regulator proteins. The ros chromosomal gene is present in octopine and nopaline strains of Agrobacterium tumefaciens as well as in Rhizobium meliloti (Sinorhizobium meliloti). This gene encodes a 15.5kDa protein that specifically represses the virC and virD operons in the virulence region of the Ti plasmid [PMID: 2013576] and is necessary for succinoglycan production [PMID: 7756693]. S. meliloti can produce two types of acidic exopolysaccharides, succinoglycan and galactoglucan, that are interchangeable for infection of Medicago sativa (Alfalfa) nodules. MucR from S. meliloti acts as a transcriptional repressor that blocks the expression of the exp genes responsible for galactoglucan production therefore allowing the exclusive production of succinoglycan [PMID: 10656595].

GO terms

Biological Process

GO:0006355 regulation of transcription, DNA-templated

Molecular Function

GO:0003677 DNA binding
GO:0008270 zinc ion binding

Cellular Component

No terms assigned in this category.

Contributing signatures

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