Download MendeleyStructure of putative 4-amino-4-deoxychorismate lyase from Thermus thermophilus HB8.
Padmanabhan, B., Bessho, Y., Ebihara, A., Antonyuk, S.V., Ellis, M.J., Strange, R.W., Kuramitsu, S., Watanabe, N., Hasnain, S.S., Yokoyama, S.(2009) Acta Crystallogr Sect F Struct Biol Cryst Commun 65: 1234-1239
- PubMed: 20054118
- DOI: https://doi.org/10.1107/S1744309109050052
- Primary Citation of Related Structures:
2ZGI - PubMed Abstract:
The pyridoxal 5'-phosphate-dependent enzyme 4-amino-4-deoxychorismate lyase converts 4-amino-4-deoxychorismate to p-aminobenzoate and pyruvate in one of the crucial steps in the folate-biosynthesis pathway. The primary structure of the hypothetical protein TTHA0621 from Thermus thermophilus HB8 suggests that TTHA0621 is a putative 4-amino-4-deoxychorismate lyase. Here, the crystal structure of TTHA0621 is reported at 1.93 A resolution. The asymmetric unit contained four NCS molecules related by 222 noncrystallographic symmetry, in which the formation of intact dimers may be functionally important. The cofactor pyridoxal 5'-phosphate (PLP) binds to the protein in the large cleft formed by the N-terminal and C-terminal domains of TTHA0621. The high structural similarity and the conservation of the functional residues in the catalytic region compared with 4-amino-4-deoxychorismate lyase (PabC; EC 4.1.3.38) from Escherichia coli suggest that the TTHA0621 protein may also possess 4-amino-4-deoxychorismate lyase activity.
Organizational Affiliation:
Systems and Structural Biology Center, Yokohama Institute, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama 230-0045, Japan. bpadmanabhan@hotmail.com
