Structural features of residue 21 in chain A

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Electrostatic Interactions:
HIS A 12 ND1	ASP A 21 OD1	-1.472	INTRA-CHAIN
HIS A 12 NE2	ASP A 21 OD1	-1.444	INTRA-CHAIN
ASP A 21 OD1	HIS A 12 ND1	-1.472	INTRA-CHAIN
ASP A 21 OD1	GLU D 52 OE1	3.466	INTER-CHAIN
ASP A 21 OD1	ASP A 197 OD1	3.167	INTRA-CHAIN
ASP A 21 OD1	ASP A 197 OD2	2.806	INTRA-CHAIN
ASP A 21 OD2	HIS A 12 ND1	-1.452	INTRA-CHAIN
ASP A 21 OD2	GLU A 25 OE1	2.815	INTRA-CHAIN
ASP A 21 OD2	GLU D 52 OE1	3.347	INTER-CHAIN
ASP A 21 OD2	GLU D 67 OE1	2.725	INTER-CHAIN
ASP A 21 OD2	GLU D 68 OE1	2.859	INTER-CHAIN
ASP A 21 OD2	ASP A 197 OD1	2.780	INTRA-CHAIN
GLU A 25 OE1	ASP A 21 OD2	2.815	INTRA-CHAIN
ASP A 197 OD1	ASP A 21 OD1	3.167	INTRA-CHAIN
ASP A 197 OD1	ASP A 21 OD2	2.780	INTRA-CHAIN
ASP A 197 OD2	ASP A 21 OD1	2.806	INTRA-CHAIN
GLU D 52 OE1	ASP A 21 OD2	3.347	INTER-CHAIN
GLU D 52 OE2	ASP A 21 OD2	3.462	INTER-CHAIN
GLU D 67 OE1	ASP A 21 OD2	2.725	INTER-CHAIN
GLU D 67 OE2	ASP A 21 OD2	2.942	INTER-CHAIN
GLU D 68 OE1	ASP A 21 OD2	2.859	INTER-CHAIN
GLU D 68 OE2	ASP A 21 OD2	2.872	INTER-CHAIN

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Protrusion Index:
ASP A 21 N	0.77
ASP A 21 CA	1.13
ASP A 21 C	1.02
ASP A 21 O	1.48
ASP A 21 CB	1.57
ASP A 21 CG	1.24
ASP A 21 OD1	0.93
ASP A 21 OD2	1.71

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Van der Waal's Interactions:
ILE A 19 CD1 153	ASP A 21 OD2 170	-0.020	INTRA-CHAIN
ASP A 21 OD2 170	THR A 22 CG2 177	-0.027	INTRA-CHAIN
ASP A 21 OD2 170	ARG D 54 NH2 5428	-0.021	INTER-CHAIN