P-selectin blocking potency of multimeric tyrosine sulfates in vitro and in vivo
摘要:
P-selectin blocking potency was investigated using synthetic monomeric and polymeric anionic compounds containing sulfate groups such as O-sulfotyrosine (sTyr) and/or sulfated Lewis structures. A non-carbohydrate-containing polyacrylamide conjugate sTyr-PAA (80% mol of sTyr) was a remarkably potent inhibitor of P-selectin binding in vitro, having an IC50 value of 6 ng/mL (equivalent to 10 nM calculated on the basis of sTyr residues or 0.1 nM calculated by the mass of the macromolecule). The inhibitory effect of sTyr-PAA (80%) towards P-selectin is significantly greater than that of facoidan (IC50, 100 ng/mL). However, sTyr-PAA (80%) was less effective than fucoidan at reducing neutrophil extravasation in an in vivo rat model of peritonitis. (C) 2003 Elsevier Science Ltd. All rights reserved.
Peptide bond formation by aminolysin-A catalysis: A simple approach to enzymatic synthesis of diverse short oligopeptides and biologically active puromycins
peptide bonds to give linear homo-oligopeptides, hetero-dipeptides, and cyclicdipeptides using cost-effective substrates in a one-pot reaction. Aminolysin-A can recognize several C-terminal-modified aminoacids, including the L- and D-forms, as acyl donors as well as free amines, including aminoacids and puromycin aminonucleoside, as acyl acceptors. The absence of aminoacid esters prevents the formation
C-TERMINUS AMIDATION ENZYME COMPOSITION, PROCESS FOR ITS PREPARATION AND ITS USE
申请人:SHISEIDO COMPANY LIMITED
公开号:EP0447547A1
公开(公告)日:1991-09-25
A C-terminus amidation enzyme composition of serum or blood plasma origin, which acts on a C-terminus glycine adduct represented by formula (I) (wherein A represents a residue other than α-amino or imino group and α-carboxyl group of a natural α-amino acid origin, and X represents a hydrogen atom or a residue of an amino acid derivative bound to the N atom via a carbonyl group) to produce a C-terminus amidation product represented by formula (II) (wherein A and X are as defined above) and glyoxylic acid, is disclosed. A process for preparing the composition and its use are also disclosed.
一种来源于血清或血浆的 C-端酰胺化酶组合物,它作用于式(I)代表的 C-端甘氨酸加合物(其中 A 代表除天然 α-氨基酸来源的 α-氨基或亚胺基和 α-羧基以外的残基),X 代表氢原子或通过羰基与 N 原子结合的氨基酸衍生物残基、和 X 代表氢原子或通过羰基与 N 原子结合的氨基酸衍生物残基),以产生由式 (II) 代表的 C 端酰胺化产物(其中 A 和 X 如上定义)和乙醛酸。还公开了制备该组合物的工艺及其用途。
US4673483A
申请人:——
公开号:US4673483A
公开(公告)日:1987-06-16
US5354675A
申请人:——
公开号:US5354675A
公开(公告)日:1994-10-11
Syntheses of Tyrosyltyrosyltyrosine and Tyrosyltyrosyltyrosyltyrosine