Table 4. PISA analysis of acarbose (ACR) structures (hydrogen bonds).

The distance cutoff for hydrogen bonds used here is 3.2 Å. For both structures chain A was used in the comparison (GtfC, PDB entry 3aib; GtfB, PDB entry 8fjc).

GtfC				GtfB
Residue	Atom	ACR atom	Distance (Å)	Distance (Å)	ACR atom	Atom	Residue
Arg475	NH2	O2A	3.05	3.05	O2A	NH2	Arg449
Asp477	OD2	O6A	3.23	2.83	O6A	OD2	Asp451
Asn481	ND2	O2B	2.50	3.02	O2B	OD1	Asn455
Glu515	OE2	N4B	3.13	2.80	O3B	OE1	Glu489
				2.39	O1D	ND2	Asn511
Arg540	NH2	O1D	3.03	3.17	O6D	NH2	Arg514
Arg540	NH1	O1D	3.01
His587	NE2	O3A	2.28	2.83	O3A	NE2	His561
				2.80	O2A	NE2	His561
Asp588	OD2	N4B	3.19	3.09	N4B	OD2	Asp562
				2.83	O2A	OD2	Asp562
				2.67	O4A	OD2	Asp883
				2.77	O6A	NE2	Gln934