Design and Synthesis of a Consensus Signal Sequence That Inhibits Protein Translocation into Rough Microsomal Vesicles

Overview

Journal Biochem J

Specialty Biochemistry

Date 1984 Nov 15

PMID 6508767

Citations 20

Authors

B M Austen

J Hermon-Taylor

M A Kaderbhai

D H Ridd

Affiliations

Soon will be listed here.

Abstract

Most signal sequences are found to vary considerably in length and primary sequence, but possess some common structural features. Analysis of known signal sequences has led to the design of a 19-residue sequence that, although not a naturally occurring signal, possesses the structural features that commonly occur in pre-proteins. This peptide has been synthesized by solid-phase methods, and has been shown to inhibit, in a concentration-dependent manner, the processing in vitro of nascent pre-prolactin, pre-forms of pancreatic digestive enzymes, and pre-placental lactogen. The peptide acts at the cytoplasmic surface of microsomal vesicles added to the protein translation system, preventing translocation of the nascent chains to the lumenal space of vesicles where signal peptidase normally cleaves to remove the signal from nascent pre-proteins.

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