Abstract
We isolated 26 suppressor mutations that allowed growth of a delta pdxH::omega null mutant in the absence of pyridoxal. Each suppressor mapped to pdxJ, and the eight suppressors sequenced contained the same glycine-to-serine change in the PdxJ polypeptide. This bypass suppression suggests that PdxJ may participate in formation of the pyridine ring of pyridoxine 5'-phosphate.
MeSH Terms
Bacterial Proteins/genetics
Escherichia coli/enzymology,genetics
Escherichia coli Proteins
Ligases
Models, Biological
Mutagenesis, Insertional
Point Mutation
Pyridoxal Phosphate/analogs & derivatives,biosynthesis,metabolism
Pyridoxaminephosphate Oxidase/genetics,metabolism
Sequence Deletion
Suppression, Genetic
Chemicals
Bacterial Proteins
Escherichia coli Proteins
PdxJ protein, E coli
Pyridoxal Phosphate
Pyridoxaminephosphate Oxidase
Ligases
pyridoxine 5-phosphate
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Man T K
Department of Microbiology and Molecular Genetics, University of Texas Houston Medical School 77030-1501, USA.
Zhao G
Winkler M E
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