CLONING AND EXPRESSION OF CDNA-ENCODING HUMAN BETACELLULIN, A NEW MEMBER OF THE EGF FAMILY

被引:114
作者
SASADA, R [1 ]
ONO, Y [1 ]
TANIYAMA, Y [1 ]
SHING, Y [1 ]
FOLKMAN, J [1 ]
IGARASHI, K [1 ]
机构
[1] HARVARD UNIV,CHILDRENS HOSP,SCH MED,DEPT SURG,BOSTON,MA 02115
关键词
D O I
10.1006/bbrc.1993.1173
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Betacellulin (BTC) is a novel growth factor purified from the conditioned media of mouse pancreatic beta tumor cells and has been found to be a new member of the epidermal growth factor (EGF) family. The cDNA encoding human BTC has been cloned from a cDNA library prepared from human breast adenocarcinoma cell line MCF-7. The nucleotide sequence encodes a polypeptide which consists of 178 amino acid residues including a putative signal sequence, indicating that the structural organization of human BTC is similar to that of mouse BTC. The amino acid sequence of the human BTC precursor protein exhibits 79% similarity with that of the mouse precursor protein. The BTC gene was found to be expressed in several mouse tissues including kidney and liver as well as in a mouse beta tumor cell line and MCF-7 cells, suggesting that BTC might play a physiological role in normal tissues. © 1993 Academic Press, Inc.
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收藏
页码:1173 / 1179
页数:7
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