| Literature DB >> 7905263 |
M P Kalapos1, G J Cao, S R Kushner, N Sarkar.
Abstract
A second poly(A) polymerase (PAP II) has been identified in Escherichia coli using a strain carrying a deletion of pcnB (the structural gene for PAP I; Cao and Sarkar, 1992b) and pnp-7 (a null mutation in the structural gene for polynucleotide phosphorylase). While PAP I has a M(r) of 53,000, PAP II is a smaller protein with a native M(r)-35,000. PAP II differs from PAP I in preferring poly(A) over tRNA primers and being more thermolabile. The presence of multiple poly(A) polymerases in E. coli raises interesting questions regarding the role of polyadenylation in mRNA synthesis and decay.Entities:
Mesh:
Substances:
Year: 1994 PMID: 7905263 DOI: 10.1006/bbrc.1994.1067
Source DB: PubMed Journal: Biochem Biophys Res Commun ISSN: 0006-291X Impact factor: 3.575