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Figure 4
Ligands bound to TtPurL. (a) The OMIT electron-density map contoured at the 1.0σ level for bound ADP and PO43−. (b) Bound ADP in TtPurL, TmPurL (PDB entry 2hru ) and StPurL (PDB entry 1t3t ). The Cα, C and N atoms in the backbone of Lys83, Glu85, Asp109, Asp485, Gly522 and Asn523 and the corresponding residues in TmPurL and StPurL are superimposed. Glu67 and the corresponding residues are shown but not used for superposition. Lys83 is located on the opposite side of the phosphate group of ADP and its label is not shown. (c) Bound PO43− in TtPurL and StPurL (1t3t ) and bound FGAR in TmPurL (PDB entry 2hs3 ). The Cα, C and N atoms in the backbone of Ser86, Asn88, His89 and Ser525 and the corresponding residues in TmPurL and StPurL are superimposed. (d) Bound Mg2+ in TtPurL and StPurL (PDB entry 1t3t ). The Cα, C and N atoms in the backbone of Asp430, Asn472 and Asp620 and the corresponding residues in StPurL are superimposed.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
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