The human intraepithelial lymphocyte marker HML‐1 is an integrin consisting of a β7 subunit associated with a distinctive α chain
The human intraepithelial lymphocyte marker HML‐1 is an integrin consisting of a β7 subunit associated with a distinctive α chain
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人上皮内淋巴细胞标记物 HML-1 是一种整合素,由与独特 α 链相关的 β7 亚基组成
DOI:
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发表时间:
1992
期刊:
影响因子:
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通讯作者:
T. Meo
中科院分区:
文献类型:
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作者:
N. Cerf‐Bensussan;B. Bègue;J. Gagnon;T. Meo
The membrane antigen defined by the monoclonal antibody (mAb) HML‐1 is abundantly expressed on, and largely restricted to, the T cells which populate the intestinal epithelium. We show that the mature form of the antigen is a heterodimer comprising a 150‐kDa α chain and a 120‐kDa β chain. Direct sequencing of tryptic peptides cleaved from the purified β chain identified this polypeptide with the integrin β7 isotype. cDNA clones coding for the β7 chain have recently been isolated from T cell cDNA libraries, but the β7 chain had not been identified at the protein level. No information is available concerning the primary structure of the HML‐1 α chain. We show that this subunit is synthesized as a precursor form that undergoes, like several other integrin α subunits, a post‐translational cleavage of a peptide bond. Among the 11 human integrin α chains previously identified, 10 have biochemical features and/or a distribution different from those of HML‐1 α. One, VLAα4 (CD49d), has a molecular mass of 150 kDa and is expressed on HML‐1+ cells but is not recognized by HML‐1 mAb. We conclude that HML‐1 is a novel member of the integrin family made of the β7 chain and of an as‐yet‐undescribed human α chain characterized by the post‐translational cleavage of a 10‐kDa peptide. HML‐1 is, thus, probably the human counterpart of the mouse antigen M290.
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影响因子:
11.4
作者:
CORBI, AL;MILLER, LJ;SPRINGER, TA
通讯作者:
SPRINGER, TA
DOI:
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发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Heino,J;Ignotz,RA;Hemler,ME;Crouse,C;Massagué,J
通讯作者:
Massagué,J
DOI:
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发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Ignotz,RA;Heino,J;Massagué,J
通讯作者:
Massagué,J
DOI:
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发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Erle,DJ;Rüegg,C;Sheppard,D;Pytela,R
通讯作者:
Pytela,R
DOI:
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发表时间:
1986
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Cerf-Bensussan,N;Guy-Grand,D;Lisowska-Grospierre,B;Griscelli,C;Bhan,AK
通讯作者:
Bhan,AK