| Isolation of bovine kidney leucine aminopeptidase cDNA: comparison with the lens enzyme and tissue-specific expression of two mRNAs. | |
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MedLine Citation:
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PMID: 8369298 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Aminopeptidases catalyze the hydrolysis of amino acid residues from the amino terminus of peptide substrates. Leucine aminopeptidase (LAP) from bovine lens is the best characterized aminopeptidase and the only LAP for which the amino acid sequence was determined by protein sequencing. Using this sequence information, we isolated a bovine kidney LAP cDNA and compared its deduced amino acid sequence to the published amino acid sequence for bovine lens LAP. Overall, the sequences are highly conserved. However, several differences are observed. The kidney LAP cDNA indicates a 26 amino acid extension at the amino terminus which is not found in the mature purified lens LAP. The cDNA also indicates an additional octapeptide in the C-terminal region which was not indicated in the published lens LAP amino acid sequence but which was required for best fit of crystallographic data regarding bovine lens LAP. Several other single amino acid changes were also noted. Levels of LAP transcripts were examined in bovine lens and kidney tissue as well as in cultured lens cells. Lens epithelial tissue showed only one LAP transcript (2.4 kb) whereas two transcripts (2.0 and 2.4 kb) were observed in cultured lens cells derived from epithelial tissue and in kidney tissue. Using Northern blot analysis, we correlated LAP mRNA levels with previously determined changes of LAP activity in aging lens tissue and in progressively passaged lens epithelial cells which were used to simulate aging in vitro. No differences were found in LAP mRNA levels in epithelial tissue from old and young lenses.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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B P Wallner; C Hession; R Tizard; A Z Frey; A Zuliani; C Mura; J Jahngen-Hodge; A Taylor |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Biochemistry Volume: 32 ISSN: 0006-2960 ISO Abbreviation: Biochemistry Publication Date: 1993 Sep |
Date Detail:
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Created Date: 1993-10-14 Completed Date: 1993-10-14 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0370623 Medline TA: Biochemistry Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 9296-301 Citation Subset: IM |
Affiliation:
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Biogen, Cambridge, Massachusetts 02142. |
| Data Bank Information | |
Bank Name/Acc. No.:
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GENBANK/L04613; L04614; L04615; L04616; L17029; L17030; L17031; L17032; L17033; S65367 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Animals Base Sequence Cattle Cells, Cultured DNA Escherichia coli / enzymology Gene Expression Regulation, Enzymologic* Kidney / enzymology* Lens, Crystalline / enzymology* Leucyl Aminopeptidase / chemistry, genetics* Molecular Sequence Data RNA, Messenger / metabolism* Sequence Homology, Amino Acid Zinc / analysis |
| Grant Support | |
ID/Acronym/Agency:
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EY08566/EY/NEI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/RNA, Messenger; 7440-66-6/Zinc; 9007-49-2/DNA; EC 3.4.11.1/Leucyl Aminopeptidase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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