Download MendeleyModulation of inhibitory activity of xylanase-alpha-amylase inhibitor protein (XAIP): binding studies and crystal structure determination of XAIP-II from Scadoxus multiflorus at 1.2 A resolution.
Kumar, S., Singh, N., Mishra, B., Dube, D., Sinha, M., Singh, S.B., Dey, S., Kaur, P., Sharma, S., Singh, T.P.(2010) BMC Struct Biol 10: 41-41
- PubMed: 21092126
- DOI: https://doi.org/10.1186/1472-6807-10-41
- Primary Citation of Related Structures:
3MU7 - PubMed Abstract:
Plants produce a wide range of proteinaceous inhibitors to protect themselves against hydrolytic enzymes. Recently a novel protein XAIP belonging to a new sub-family (GH18C) was reported to inhibit two structurally unrelated enzymes xylanase GH11 and α-amylase GH13. It was shown to inhibit xylanase GH11 with greater potency than that of α-amylase GH13. A new form of XAIP (XAIP-II) that inhibits α-amylase GH13 with a greater potency than that of XAIP and xylanase GH11 with a lower potency than that of XAIP, has been identified in the extracts of underground bulbs of Scadoxus multiflorus. This kind of occurrence of isoforms of inhibitor proteins is a rare observation and offers new opportunities for understanding the principles of protein engineering by nature.
Organizational Affiliation:
Department of Biophysics, All India Institute of Medical Sciences, New Delhi, India.
