The hemB gene of Escherichia coli K12, coding for porphobilinogen synthase (PBG-S; syn., 5-aminolevulinic acid dehydratase, ALA-D), was cloned following insertion of an EcoRI fragment of plasmid F'13 into the mobilizable vector pCR1. The hybrid plasmid carrying the hemB gene was able to complement a
Nucleotide sequence of the lig gene and primary structure of DNA ligase of Escherichia coli
β Scribed by Ishino, Yoshizumi ;Shinagawa, Hideo ;Makino, Kozo ;Tsunasawa, Susumu ;Sakiyama, Fumio ;Nakata, Atsuo
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 634 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0026-8925
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β¦ Synopsis
The DNA ligase of Escherichia coli catalyses the NAD-dependent formation of phosphodiester linkages between 5'-phosphoryl and 3'-hydroxyl groups in DNA. It is essential for DNA replication and repair of damaged DNA strands. We determined the nucleotide sequence of the lig gene of Escherichia coli coding for DNA ligase and flanking regions. The coding frame of the gene was confirmed by the amino acid composition and the amino- and carboxyl-terminal amino acid sequences of the purified ligase. The ligase consists of 671 amino acid residues with a molecular weight of 73,690.
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