The plastid genome of Cryptomonas phi encodes an hsp70-like protein, a histone-like protein, and an acyl carrier protein.
Proc Natl Acad Sci U S A, 1991/12/01;88(23):10783-7.
Affiliations
PMID: 1961745
Impact factor: 12.779
Abstract
The plastid genome of Cryptomonas phi, a cryptomonad alga, contains three genes that have not previously been found in any organellar genome. Each of these genes encodes a functional class of organellar gene product not previously reported. The first gene, dnaK, encodes a polypeptide of the hsp70 heat shock protein family. The predicted amino acid sequence of the DnaK protein is 54% identical to that of the Escherichia coli hsp70 protein (DnaK), 50-53% identical to that of two nucleus-encoded mitochondrial hsp70 proteins, and 43-46% identical to that of several eukaryotic cytoplasmic members of the hsp70 protein family. The second gene, hlpA, encodes a polypeptide resembling bacterial histone-like proteins. The predicted amino acid sequence of the HlpA protein is 25-53% identical to that of several bacterial histone-like proteins, and the identity increases to 39-76% over a conserved region corresponding to the long arm that binds DNA. The third gene, acpA, encodes an acyl carrier protein, which is a key cofactor in the synthesis and metabolism of fatty acids. Its predicted amino acid sequence is 36-59% identical to that of eubacterial and plant chloroplast (nucleus-encoded) acyl carrier proteins.
MeSH terms
Acyl Carrier Protein; Amino Acid Sequence; Bacterial Proteins; Base Sequence; Cloning, Molecular; DNA; DNA-Binding Proteins; Escherichia coli; Eukaryota; Genome; Heat-Shock Proteins; Histones; Molecular Sequence Data; Organelles; Plants; Plasmids; Restriction Mapping; Sequence Homology, Nucleic Acid
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