[EN] NOVEL CHELATOR AND USE THEREOF<br/>[FR] NOUVEAU CHÉLATEUR ET SON UTILISATION
申请人:GE HEALTHCARE BIO SCIENCES AB
公开号:WO2011152782A1
公开(公告)日:2011-12-08
The present invention relates to dimeric pentadentate chelators with exceptionally strong binding of metal ions, for detection, immobilization and purification of biomolecules. Dimeric chelators offer a cooperativity of binding of two adjacent immobilized metal ions simultaneously to a histidine-tagged biomolecule, which gives advantageous properties regarding strength of binding compared to a corresponding monomer chelator. In addition, a dimer increases the selectivity (ease of separation) against non-tagged biomolecules with low metal-ion affinity. The dimeric pentadentate chelator according to the invention has the following general formula (I) wherein Sc is a scaffold or a connecting structure that contains at least two functional groups enabling coupling of two pentadentate chelators (PD), and PD is a pentadentate chelator having the formula (II).
[1-.beta.-Mercaptopropionic acid,2-(3,5-dibromo-L-tyrosine)]oxytocin, a potent inhibitor of oxytocin
作者:Edwin O. Lundell、Martha F. Ferger
DOI:10.1021/jm00244a023
日期:1975.10
[1-Beta-Mercaptopropionic acid,2-(3,5-dibromo-L-tyrosine)]oxytocin was synthesized from a protected polypeptide intermediate that had been prepared by the condensation of S-ethylcarbamoyl-beta-mercaptopropionyl-3,5-dibromotyrosine with H-Ile-Gln-Asn-Cys(Ec)-Pro-Leu-Gly-NH2, using dicyclohexylcarbodiimide in dimethylformamide. The ethylcarbamoyl (Ec) protecting groups were removed by refluxing NH3,
Compounds represented by the following general formula (1) or pharmaceutically acceptable salts thereof:
[wherein Z represents -A-X-R1, a heterocycle or cycloalkyl; A represents a methylene group; X represents a sulfur atom; R1 represents a benzoyl group; R2 represents - N(R3)R4 (wherein R3 represents a methyl group; and R4 represents an optionally substituted alkyl group, etc.); or a group represented by the following general formula (2):
wherein R5 and R6 represent each a hydrogen atom; and Y represents a group represented by the following general formula (3):
(wherein R4 is as defined above)}].
Because of having vasodilative effect, myocardial protective effect, antiplatelet aggregation effect, etc., the compounds represented by the above general formula (1) or pharmaceutically acceptable salts thereof are useful as drugs such as therapeutic medicines for angina pectoris.
The present invention relates to dimeric pentadentate chelators with exceptionally strong binding of metal ions, for detection, immobilization and purification of biomolecules. Dimeric chelators offer a cooperativity of binding of two adjacent immobilized metal ions simultaneously to a histidine-tagged biomolecule, which gives advantageous properties regarding strength of binding compared to a corresponding monomer chelator. In addition, a dimer increases the selectivity (ease of separation) against non-tagged biomolecules with low metal-ion affinity.