Abstract:
:The abilities of eight extracellular matrix proteins, fibronectin, vitronectin, laminin, and collagen types I, II, III, IV, and V to bind insulin were examined by binding studies with insulin conjugated with peroxidase. At a physiological pH and ionic strength, type V collagen bound to insulin most strongly. The other types of collagen, laminin, and vitronectin also bound insulin with affinity lower than that of type V collagen. The insulin-binding site of type V collagen was in a 30-kDa CNBr fragment of the alpha 1 (V) chain. Analysis of the amino acid sequence showed that this 30-kDa fragment was identical to the heparin-binding fragment of type V collagen. The insulin-binding sites of laminin and vitronectin were located in the A chain and in the heparin-binding domain, respectively. Insulin bound to type V collagen stimulated the synthesis of DNA by mouse mammary tumor MTD cells, indicating that bound insulin retained mitogenic activity.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Yaoi Y,Hashimoto K,Takahara K,Kato Idoi
10.1016/0014-4827(91)90351-tsubject
Has Abstractpub_date
1991-06-01 00:00:00pages
180-5issue
2eissn
0014-4827issn
1090-2422pii
0014-4827(91)90351-Tjournal_volume
194pub_type
杂志文章abstract::We have reported that PAP-1, a product of a causative gene for autosomal retinitis pigmentosa, plays a role in splicing. In this study, CIR, a protein originally identified as a CBF1-interacting protein and reported to act as a transcriptional corepressor, was identified as a PAP-1 binding protein and its function as ...
journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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pub_type: 杂志文章
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journal_title:Experimental cell research
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journal_title:Experimental cell research
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journal_title:Experimental cell research
pub_type: 杂志文章
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journal_title:Experimental cell research
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