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Gene Review

ddlB  -  D-alanine:D-alanine ligase

Escherichia coli str. K-12 substr. MG1655

Synonyms: ECK0093, JW0090, ddl
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Disease relevance of ddlB

  • Both constructs, when used to transform E. coli M72, gave similar levels of expression of the ddl gene [1].

High impact information on ddlB

  • Viability of the E. coliDeltaddlADeltaddlB mutant in the absence of exogenous D-Ala-D-Ala dipeptide became dependent on the expression of the chlamydial murC-ddl thus demonstrating functional ligase activity [2].
  • By plasmid integration and PBS1 transduction, we found the chromosomal locus of rpoF linked to ddl and dal at 40 degrees on the B. subtilis map and near no known lesions affecting growth regulation or development [3].
  • A 1.2-kilobase-pair BamHI fragment from a cell envelope-cell division gene cluster of Escherichia coli containing ddl and part of ftsQ was cloned and sequenced, and the sequence was interpreted with the aid of genetic complementation and promoter fusion data for the region [4].
  • Analysis of the DNA sequence further showed that the termination codon of ddl is separated from the initiation codon of ftsQ by one base, which suggests that these two genes may be translationally coupled when transcription is initiated upstream of ddl [4].
  • This lies in a group of five genes of similar phenotype (in the order murE murF murG murC ddl) all concerned with peptidoglycan biosynthesis [5].

Biological context of ddlB


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