Table 2. Potential electrostatic interactions between PLP and TTHA0621.

PLP	TTHA0621	Distance (Å)
OP1	Arg44 NH1	2.71
	Arg44 NH2	2.99
	Ile183 N	2.90
OP2	Thr184 N	2.93
	Thr184 OG1	2.90
OP3	Ser218 OG	2.72
	Ser218 N	3.04
N1	Asp159 OD1	2.91
C4†	Lys126 NZ	2.89
O3‡	Tyr130	—

^†C4 of PLP forms a Schiff-base bond to Lys126 NZ.

^‡A water molecule bridges O3 of PLP and Tyr130.