AMINO-ACID SEQUENCE AND DOMAIN-STRUCTURE OF ENTACTIN - HOMOLOGY WITH EPIDERMAL GROWTH-FACTOR PRECURSOR AND LOW-DENSITY LIPOPROTEIN RECEPTOR

作者：DURKIN ME^*; CHAKR**ARTI S; BARTOS BB; LIU SH; FRIEDMAN RL; CHUNG AE

来源：The Journal of Cell Biology, 1988, 107(6): 2749-2756.

DOI：10.1083/jcb.107.6.2749

<jats:p>Entactin (nidogen), a 150-kD sulfated glycoprotein, is a major component of basement membranes and forms a highly stable noncovalent complex with laminin. The complete amino acid sequence of mouse entactin has been derived from sequencing of cDNA clones. The 5.9-kb cDNA contains a 3,735-bp open reading frame followed by a 3'-untranslated region of 2.2 kb. The open reading frame encodes a 1,245-residue polypeptide with an unglycosylated Mr of 136,500, a 28-residue signal peptide, two Asn-linked glycosylation sites, and two potential Ca2+-binding sites. Analysis of the deduced amino acid sequence predicts that the molecule consists of two globular domains of 70 and 36 kD separated by a cysteine-rich domain of 28 kD. The COOH-terminal globular domain shows homology to the EGF precursor and the low density lipoprotein receptor. Entactin contains six EGF-type cysteine-rich repeat units and one copy of a cysteine-repeat motif found in thyroglobulin. The Arg-Gly-Asp cell recognition sequence is present in one of the EGF-type repeats, and a synthetic peptide from the putative cell-binding site of entactin was found to promote the attachment of mouse mammary tumor cells.</jats:p>

• 出版日期1988-12