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Gene Review

pcm  -  L-isoaspartate protein...

Escherichia coli str. K-12 substr. MG1655

Synonyms: ECK2738, JW2713
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Disease relevance of pcm

  • The sequence determined for the N-terminal 39 residues was used to design an oligonucleotide probe that allowed the precise localization of its structural gene (pcm) on the physical map of the E. coli chromosome at 59 min [1].

High impact information on pcm

  • We inserted a chloramphenicol cassette into the disrupted coding region of iadA in both a parent strain (MC1000) and a derivative strain (CL1010) lacking pcm, the gene encoding the L-isoaspartyl methyltransferase involved in the repair of isomerized proteins [2].
  • The nucleotide sequence determined for the pcm gene and its flanking regions was used to deduce a mature amino acid sequence of 207 residues with a calculated molecular weight of 23,128 [1].
  • These cells were found to survive poorly in stationary phase, at elevated temperatures, and in high-salt media compared with parent cells containing the intact gene, and we thus designate this gene surE (survival). surE appears to be the first gene of a bicistronic operon also containing the pcm gene [3].
  • The latter open reading frame overlapped the 5' end of the pcm gene by 4 bp [3].
  • We determined the DNA sequence of a 2,232-bp region immediately upstream of the pcm gene at 59 min on the Escherichia coli chromosome that encodes an L-isoaspartyl protein methyltransferase with an important role in stationary-phase survival [3].

Biological context of pcm


Regulatory relationships of pcm

  • A null mutation in surE also suppressed stress-survival defects previously observed in a pcm mutant strain, providing further evidence for an interaction between the two gene products [4].


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