申请人:Kureha Kagaku Kogyo Kabushiki Kaisha
公开号:US04404133A1
公开(公告)日:1983-09-13
Disclosed herein are the peptides possibly radio-labelled and having primary structures represented by the general formula (I): X-Ser-Gln-Gly-Gly-Ser-Asn-Y (I) wherein (1) X is H-Tyr-Gln-Ala-Lys and Y is a hydroxyl group, (2) X is pGlu-Ala-Lys(N.sup..epsilon. -Tyr-H) and Y is a hydroxyl group, or (3) X is pGlu-Ala-Lys and Y is Tyr-OH. These peptides can be synthesized by bonding a pre-determined amino acid or a peptide to the nitrogen at one of the two ends of the starting material, H-Asn-OH or H-Asn-Tyr-OH, while leaving the carboxyl group at the other end thereof in a free state, and by successively repeating the same procedure on the thus prepared peptides. The symbols, Ser, Gln, Gly, Asn, Tyr, Ala and Lys used herein represent respectively a divalent residue formed by removing one hydrogen atom from the amino group of and further removing one hydroxyl group from the carboxyl group of the respective alpha- amino acids, serine, glutamine, glycine, asparagine, tyrosine, alanine and lysine. For instance, Ser represents the divalent residue, --NH--CH(CH.sub.2 OH)--CO--. The symbol, pGlu, represents a monovalent residue formed by removing one hydroxyl group from the carboxyl group of pyroglutamic acid.
本文披露了可能被放射性标记的肽段,其主要结构由通式(I)表示:X-Ser-Gln-Gly-Gly-Ser-Asn-Y(I),其中(1)X为H-Tyr-Gln-Ala-Lys,Y为一个羟基;(2)X为pGlu-Ala-Lys(N.sup..epsilon.-Tyr-H),Y为一个羟基;或者(3)X为pGlu-Ala-Lys,Y为Tyr-OH。这些肽段可以通过将预定的氨基酸或肽段连接到起始物质H-Asn-OH或H-Asn-Tyr-OH的两端之一的氮上,同时将另一端的羧基保持在自由状态,并通过在制备的肽段上重复相同的程序来合成。这里使用的符号Ser、Gln、Gly、Asn、Tyr、Ala和Lys分别表示由α-氨基酸丝氨酸、谷氨酰胺、甘氨酸、天冬酰胺、酪氨酸、丙氨酸和赖氨酸的氨基团中去除一个氢原子和羧基中去除一个羟基而形成的二价残基。例如,Ser表示二价残基,--NH--CH(CH2OH)--CO--。符号pGlu表示由吡磷酸氨基羧基中去除一个羟基而形成的一价残基。