Abstract
Human metallothionein-3 (hMT3), also named human neuronal growth inhibitory factor (hGIF), is attractive due to its distinct neuronal growth inhibitory activity, which is not shown by other human MT isoforms. It has been reported that the neuronal growth inhibitory activity arises from the N-terminal β-domain rather than its C-terminal α-domain. However, previous bioassay results have shown that the single β-domain is less effective at inhibiting the neuron growth than that in intact hMT3 on a molar basis, which suggests that the α-domain is indispensable to the neuronal growth inhibitory activity of hMT3. In order to confirm this assumption, we constructed two domain-hybrid mutants, the β(MT3)–β(MT3) mutant and the β(MT3)–α(MT1) mutant, and investigated their structural and metal binding properties by UV-vis spectroscopy, CD spectroscopy, pH titration, DTNB reaction, EDTA reaction, etc. The results showed that stability of the Cd3S9 cluster of the β(MT3)–β(MT3) mutant decreased significantly while the Cd3S9 cluster of the β(MT3)–α(MT1) mutant had a similar stability and solvent accessibility to that of hMT3. Interestingly, the bioassay results showed that the neuronal growth inhibitory activity of the β(MT3)–β(MT3) mutant decreased significantly, while the β(MT3)–α(MT1) mutant showed similar inhibitory activity to hMT3. Based on these results, we conclude that the α-domain is indispensable and plays an important role in modulating the stability of the metal cluster in the β-domain by domain–domain interactions, thus influencing the bioactivity of hMT3.
Similar content being viewed by others
References
Kagi JHR, Schaffer A (1988) Biochemistry 27:8509–8511
Kagi JHR, Kojima Y (1987) Experientia 52:25–61
Margoshes M, Vallee BL (1957) J Am Chem Soc 79:4813–4814
Uchida Y, Tomonaga M (1989) Brain Res 481:190–193
Uchida Y, Takio K, Titani K, Ihara Y, Tomonaga M (1991) Neuron 7:337–347
Palmiter RD, Findley SD, Whitemore TE, Durnam DM (1992) Proc Natl Acad Sci USA 89:6333–6337
Irie Y, Keung WM (2001) Biochem Biophys Res Commun 282:416–420
Irie Y, Keung WM (2003) Brain Res 960:228–234
Hasler DW, Faller P, Vasak M (1998) Biochemistry 37:14966–14973
Faller P, Vasak M (1997) Biochemistry 36:13341–13348
Sewell AK, Jensen LT, Erickson JC, Palmiter RD, Winge DR (1995) Biochemistry 34:4740–4747
Uchida Y, Ihara Y (1995) J Biol Chem 270:3365–3369
Romero-Isart N, Jensen LT, Zerbe O, Winge DR, Vasak M (2002) J Biol Chem 277:37023–37028
Hasler DW, Jensen LT, Zerbe O, Winge DR, Vasak M (2000) Biochemistry 39:14567–14575
Ni FY, Cai B, Ding ZC, Zheng F, Zhang MJ, Wu HM, Sun HZ, Huang ZX (2007) Proteins: Struct Funct Bioinf 68:255–266
Williamson MP (1994) Biochem J 297:249–260
Cai B, Zheng Q, Teng XC, Chen D, Wang Y, Wang KQ, Zhou GM, Xie Y, Zhang MJ, Sun HZ, Huang ZX (2006) J Biol Inorg Chem 11:476–482
Ding ZC, Teng XC, Cai B, Wang H, Zheng Q, Wang Y, Zhou GM, Zhang MJ, Wu HM, Sun HZ, Huang ZX (2006) Biochem Biophys Res Commun 349:674–682
Higucchi R, Krummel B, Saiki RK (1988) Nucleic Acids Res 16:7351–7367
Vasak M (1991) Methods Enzymol 205:452–458
Grassetti DR, Murray JF (1967) Arch Biochem Biophys 119:41–49
Winge DR, Miklossy KA (1982) J Biol Chem 257:3471–3476
Vasak M, Kagi JHR (1983) In: Sigel H (ed) Metal ions in biological systems. Marcel Dekker Inc., New York, pp 213–273
Kagi JHR, Vallee B (1961) J Biol Chem 236:2435–2442
Wang Y, Mackay EA, Kurasaki M, Kagi JHR (1994) Eur J Biochem 225:449–457
Li TY, Kraker AJ, Show CF III, Petering DH (1980) Proc Natl Acad Sci USA 77:6334–6338
Shaw CF III, Savas MM, Petering DH (1991) Methods Enzymol 205:401–414
Uchida Y, Ihara Y, Tomonaga M (1988) Biochem Biophys Res Commun 150:1263–1267
Chung RS, Vickers JC, Chuan MI, Eckhardt BL, West AK (2002) Exp Neurol 178:1–12
Erickson JC, Sewell AK, Jensen LT, Winge DR, Palmiter RD (1994) Brain Res 649:297–304
Xiong Y, Ru BG (1997) J Biochem 121:1102–1106
Vasak M (1998) Biodegradation 9:501–512
Oz G, Pountney DL, Armitage IM (1998) Biochem Cell Biol 76:223–234
Vasak M, Kagi JHR, Hill HAO (1981) Biochemistry 20:2852–2856
Stillman MJ, Cai WH, Zelazowski AJ (1987) J Biol Chem 262:4538–4558
Zheng Q, Yang WM, Yu WH, Cai B, Teng XC, Xie Y, Sun HZ, Zhang MJ, Huang ZX (2003) Protein Eng 16:865–870
Cismowski MJ, Huang PC (1991) Biochemistry 30:6626–6632
Chang CC, Liao WF, Huang PC (1998) Protein Eng 11:41–46
Jiang LJ, Vasak M, Vallee BL, Maret W (2000) Proc Natl Acad Sci USA 97:2503–2508
Faller P, Hasler DW, Zerbe O, Klauser S, Winge DR, Vasak M (1999) Biochemistry 38:10158–10167
Erickson JC, Hollopeter G, Thomas SA, Froelick GJ, Palmiter RD (1997) J Neurosci 17:1271–1281
Palmiter RD (1995) Toxicol Appl Pharmacol 135:139–146
Acknowledgments
This project was supported by the National Science Foundation of China.
Author information
Authors and Affiliations
Corresponding author
Additional information
Z.-C. Ding and Q. Zheng contributed equally to this work.
Rights and permissions
About this article
Cite this article
Ding, ZC., Zheng, Q., Cai, B. et al. Effect of α-domain substitution on the structure, property and function of human neuronal growth inhibitory factor. J Biol Inorg Chem 12, 1173–1179 (2007). https://doi.org/10.1007/s00775-007-0287-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00775-007-0287-x