Abstract:
:Two angiotensin-I-converting enzyme (ACE) inhibitory peptides were isolated from a tryptic hydrolysate of human serum albumin (HSA). The peptides were identified by sequencing and other analyses as Ala-Trp and the nonapeptide Ala-Phe-Lys-Ala-Trp-Ala-Val-Ala-Arg (human albutensin A), corresponding to f(213-214) and f(210--218) of HSA, respectively. Synthetic versions of both peptides had previously been shown to have ACE inhibitory activity. The present results are the first to show that these peptides have a potential natural origin in humans. Additional studies were done to define the inhibitory properties of these peptides, as they had not been previously reported. The dipeptide and nonapeptide showed dose-dependent inhibition of ACE, with IC50 values of 12 and 1.7 micromol/l, respectively. Lineweaver-Burk plots suggested that Ala-Trp is a competitive inhibitor, and that human albutensin A is a noncompetitive inhibitor.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Nakagomi K,Ebisu H,Sadakane Y,Fujii N,Akizawa T,Tanimura Tdoi
10.1248/bpb.23.879subject
Has Abstractpub_date
2000-07-01 00:00:00pages
879-83issue
7eissn
0918-6158issn
1347-5215journal_volume
23pub_type
杂志文章abstract::Liquid intraurethral prostaglandin E1 (PGE1) delivery system was developed using self-microemulsifying drug delivery system (SMEDDS). For this, pseudo-ternary phase diagrams were constructed and characterized. The viscosity of optimized formulation was increased gradually upon the addition of water and it was decrease...
journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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更新日期:1998-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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