The Δ33-35 Mutant α-Domain Containing β-Domain-Like M3S9 Cluster Exhibits the Function of α-Domain with M4S11 Cluster in Human Growth Inhibitory Factor. (18th April 2010)

• Record Type: Journal Article
• Authors: Bao, Qingui; Ding, Zhichun; Huang, Zhong-Xian; Tan, Xiangshi
• Other Names: Perlepes Spyros Academic Editor.
• Is Part Of: Bioinorganic chemistry and applications. Volume 2010(2010)
• Publication Date: 2010-04-18
• Subjects: Bioinorganic chemistry -- Periodicals; Bioinorganic chemistry; Biochemistry; Inorganic Chemistry; Chemistry, Bioinorganic; Periodicals; 572.51
• DOI: 10.1155/2010/294169
• Languages: English
• ISSNs: 1565-3633

Abstract

Abstract : Neuronal growth inhibitory factor (GIF), also known as metallothionein (metallothionein-3), impairs the survival and neurite formation of cultured neurons. It is known that theα -β domain-domain interaction of hGIF is crucial to the neuron growth inhibitory bioactivity although the exact mechanism is not clear. Herein, theβ (MT3)-β (MT3) mutant and the hGIF-truncatedΔ 33-35 mutant were constructed, and their biochemical properties were characterized by pH titration, EDTA, and DTNB reactions. Their inhibitory activity toward neuron survival and neurite extension was also examined. We found that theΔ 33-35 mutantα -domain containingβ -domain-likeM 3 S 9 cluster exhibits the function ofα -domain withM 4 S 11 cluster in hGIF. These results showed that the stability and solvent accessibility of the metal-thiolate cluster inβ -domain is very significant to the neuronal growth inhibitory activity of hGIF and also indicated that the particular primary structure ofα -domain is pivotal to domain-domain interaction in hGIF.