Elsevier

Genomics

Volume 51, Issue 1, 1 July 1998, Pages 27-34
Genomics

Regular Article
Identification of High-Molecular-Weight Proteins with Multiple EGF-like Motifs by Motif-Trap Screening

https://doi.org/10.1006/geno.1998.5341Get rights and content

Abstract

To identify large proteins with an EGF-like-motif in a systematic manner, we developed a computer-assisted method called motif-trap screening. The method exploits 5′-end single-pass sequence data obtained from a pool of cDNAs whose sizes exceed 5 kb. Using this screening procedure, we were able to identify five known and nine new genes for proteins with multiple EGF-like-motifs from 8000 redundant human brain cDNA clones. These new genes were found to encode a novel mammalian homologue ofDrosophilafat protein, two seven-transmembrane proteins containing multiple cadherin and EGF-like motifs, two mammalian homologues ofDrosophilaslit protein, an unidentified LDL receptor-like protein, and three totally uncharacterized proteins. The organization of the domains in the proteins, together with their expression profiles and fine chromosomal locations, has indicated their biological significance, demonstrating that motif-trap screening is a powerful tool for the discovery of new genes that have been difficult to identify by conventional methods.

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    Sequence data from this article have been deposited with the DDBJ Data Library under Accession Nos. human MEGF1, AB011535; human MEGF2, AB011536; human MEGF3, D87469; human MEGF4, AB011537; human MEGF5, AB011538; human MEGF6, AB011539; human MEGF7, AB011540; human MEGF8, AB011541; human MEGF9, AB011542; rat MEGF1, AB011527; rat MEGF2, AB011528; rat MEGF4, AB011530; rat MEGF5, AB011531; rat MEGF6, AB011532.

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