Complete amino acid sequence of human intestinal aminopeptidase N as deduced from cloned cDNA.

G M Cowell, E Kønigshøfer, E M Danielsen, O C Hansen, J Engberg, W Hunziker, Jørgen Olsen, Jette Møller, Lotte Laustsen, K G Welinder

196 Citations (Scopus)

Abstract

The complete primary structure (967 amino acids) of an intestinal human aminopeptidase N (EC 3.4.11.2) was deduced from the sequence of a cDNA clone. Aminopeptidase N is anchored to the microvillar membrane via an uncleaved signal for membrane insertion. A domain constituting amino acid 250-555 positioned within the catalytic domain shows very clear homology to E. coli aminopeptidase N and contains Zn2+ ligands. Therefore these residues are part of the active site. However, no homology of the anchor/junctional peptide domain is found suggesting that the juxta- and intra-membraneous parts of the molecule have been added/preserved during development. It is speculated that this part carries the apical address.
Original languageEnglish
JournalFEBS Letters
Volume238
Issue number2
Pages (from-to)307-14
Number of pages7
ISSN0014-5793
Publication statusPublished - 1988

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