mreD

MreD is a [SW|cell shape] determining protein, it couples the cytosolic [protein|A4C8719E06F774A6EB4D79757CC79CF89E453A54|MreB] and [protein|A4C8719E06F774A6EB4D79757CC79CF89E453A54|MreB]-like proteins to the extracellular peptidoglycan-synthesizing machinery, part of the [protein|search|Rod complex] for lateral [SW|cell wall synthesis] and control of cell diameter

locus: BSU_28010

pI: 7.91

mw: 19.67 kDa

protein length: 172 aa

gene length: 519 bp

function: [SW|cell shape] determation

product: [SW|cell shape]-determining protein

essential: yes

synonyms: rodB

Genomic Context

categories

• [category|SW 1|Cellular processes] → [category|SW 1.1|Cell envelope and cell division] → [category|SW 1.1.2|Cell shape]
• [category|SW 4|Lifestyles] → [category|SW 4.3|Coping with stress] → [category|SW 4.3.2|Cell envelope stress proteins (controlled by SigM, V, W, X, Y)]
• [category|SW 6|Groups of genes] → [category|SW 6.1|Essential genes]
• [category|SW 6|Groups of genes] → [category|SW 6.2|Membrane proteins]

Gene

Coordinates: 2,859,317 2,859,835

Phenotypes of a mutant

• the phenotype of ''mreD'' is similar to that of ''[gene|6A14D0C7FD94A838BAB3B74AA100EA678F1E4E34|mreC]
• ''mreD'' is essential under normal conditions [Pubmed|12682299]
• Depletion of MreD leads to a progressive increase in the width and a decrease in the length of the cell and cells become lytic. In the depletion strain, lysis can be prevented and cell growth, but not cell shape, can be recovered by inculaion of Magnesium in the media. This shape defect is consistent with a role for ''mreD'' in cell wall synthesis during elongation and has a similar phenotype to other genes with roles in elongation.

The protein

Catalyzed reaction/ biological activity

• None/ structural

Protein family

• mreD family (single member, according to UniProt)

Structure

• None

[SW|Localization]

• trans-membrane protein [Pubmed|21636744]
• during logarithmic growth, [protein|231C30963AFB863424C087CB722446D319976D65|MreD] forms discrete patches thst move processively along peripheral tracks perpendicular to the cell axis [Pubmed|21636744]
• forms transverse bands as cells enter the stationary phase [Pubmed|21636744]
• reports on helical structures formed by MreD [Pubmed|20566861] seem to be misinterpretation of data [Pubmed|21636744]

Expression and Regulation

Operons

• genes: [gene|A4C8719E06F774A6EB4D79757CC79CF89E453A54|mreB]-[gene|6A14D0C7FD94A838BAB3B74AA100EA678F1E4E34|mreC]-[gene|231C30963AFB863424C087CB722446D319976D65|mreD]-[gene|8C94C9598A823A8405B3E1FA0124E21D90845B8E|minC]-[gene|37DAD42A391E2FC506225EAF91B8F21629A401DF|minD]
  description: [Pubmed|8459776]

  sigma factors

  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, promoter p1, upstream of [protein|49D996C9AED44A820A214C3DF60AB1B6E1508DEA|Maf] [Pubmed|26091431], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]
  • [protein|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM]: sigma factor, promoter p2, within [protein|49D996C9AED44A820A214C3DF60AB1B6E1508DEA|Maf] [Pubmed|18179421], in [regulon|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM regulon]
  • [protein|DC3449D5F195E5C2E9E14FEC95396C8F1FDF73B4|SigH]: sigma factor, promoter p4, upstream of [protein|8C94C9598A823A8405B3E1FA0124E21D90845B8E|MinC] [Pubmed|8459776], in [regulon|DC3449D5F195E5C2E9E14FEC95396C8F1FDF73B4|SigH regulon]

  regulatory mechanism

  • [protein|08CFA2C72931A75532D4289BC1D18A826DE9F9CA|ComK]: activation, [Pubmed|26091431], in [regulon|08CFA2C72931A75532D4289BC1D18A826DE9F9CA|ComK regulon]

  regulation

  • constitutively expressed [Pubmed|23701187]

• genes: [gene|49D996C9AED44A820A214C3DF60AB1B6E1508DEA|maf]-[gene|2BD11D71AA6D9EFAD8A209C8813CC8B059180C84|radC]-[gene|A4C8719E06F774A6EB4D79757CC79CF89E453A54|mreB]-[gene|6A14D0C7FD94A838BAB3B74AA100EA678F1E4E34|mreC]-[gene|231C30963AFB863424C087CB722446D319976D65|mreD]-[gene|8C94C9598A823A8405B3E1FA0124E21D90845B8E|minC]-[gene|37DAD42A391E2FC506225EAF91B8F21629A401DF|minD]
  description: [Pubmed|22383849]

  sigma factors

  • [protein|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM]: sigma factor, promoter p2 within [protein|49D996C9AED44A820A214C3DF60AB1B6E1508DEA|Maf] [Pubmed|18179421], in [regulon|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM regulon]
  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, promoter p1, upstream of [protein|49D996C9AED44A820A214C3DF60AB1B6E1508DEA|Maf] [Pubmed|26091431], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]

  regulatory mechanism

  • [protein|08CFA2C72931A75532D4289BC1D18A826DE9F9CA|ComK]: activation, [Pubmed|11948146,11918817,21564336], in [regulon|08CFA2C72931A75532D4289BC1D18A826DE9F9CA|ComK regulon]

  regulation

  • constitutively expressed [Pubmed|23701187]

Biological materials

Mutant

• A conditional mutant with an inframe deletion of ''mreD'' complemented by a xylose inducible copy at an ectopic locus (strain named 4352) is avaliable from the Errington Group.

GFP fusion

• A functional N-terminal GFP fusion has been made where the fusion protein is the only copy of the gene in the cell: strain 3416 [Pubmed|16101995].

labs

• [SW|Peter Graumann], Freiburg University, Germany [http://www.biologie.uni-freiburg.de/data/bio2/graumann/index.htm homepage]

References

Localization

• 20566861,21636744,21636745

Other original publications

• 1400224,18156271,16101995,19643765,8459776,18179421,21630458,23879732,22383849,26091431,412835,31086310