Abstract
We have isolated and sequenced cDNA clones encoding the poly(A)-binding protein of Xenopus laevis oocytes. Polyclonal antiserum was raised against a fusion protein encoding 185 amino acids of the Xenopus poly(A)-binding protein. This antiserum localizes the poly(A)-binding protein to subcellular sites associated with protein synthesis; in the retina, immunoreactive protein is detected in the synthetically active inner segment of the photoreceptor but not in the transductive outer segment. Transcripts encoding the poly(A)-binding protein are present in oocytes, although no protein is detected on protein blots. In contrast, the levels of both transcripts and protein increase in development, which correlates with the observed increase in total poly(A) during Xenopus embryogenesis (N. Sagata, K. Shiokawa, and K. Yamana, Dev. Biol. 77:431-448, 1980).
MeSH Terms
Amino Acid Sequence
Animals
Base Sequence
Carrier Proteins/biosynthesis,genetics
Cell Differentiation
Codon
DNA/genetics
DNA Probes
Electrophoresis, Gel, Two-Dimensional
Gene Expression Regulation
Molecular Sequence Data
Oocytes/cytology
Poly A/biosynthesis,metabolism
Poly(A)-Binding Proteins
RNA, Messenger/biosynthesis
Rabbits
Retina/cytology
Xenopus laevis/embryology,genetics
Chemicals
Carrier Proteins
Codon
DNA Probes
Poly(A)-Binding Proteins
RNA, Messenger
Poly A
DNA
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Zelus B D
Department of Pharmacology, School of Medicine, University of Washington, Seattle 98915.
Giebelhaus D H
Eib D W
Kenner K A
Moon R T
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