Structural features of residue 31 in chain B

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Electrostatic Interactions:
ASP A 13 OD1	HIS B 31 ND1	-2.131	INTER-CHAIN
ASP A 13 OD2	HIS B 31 ND1	-1.837	INTER-CHAIN
ASP A 23 OD1	HIS B 31 ND1	-3.155	INTER-CHAIN
ASP A 23 OD2	HIS B 31 ND1	-4.166	INTER-CHAIN
ARG A 30 NH1	HIS B 31 NE2	2.294	INTER-CHAIN
ARG A 30 NH2	HIS B 31 NE2	2.755	INTER-CHAIN
ASP B 23 OD1	HIS B 31 ND1	-1.404	INTRA-CHAIN
ASP B 23 OD2	HIS B 31 ND1	-1.380	INTRA-CHAIN
ASP B 26 OD1	HIS B 31 ND1	-1.621	INTRA-CHAIN
ASP B 26 OD2	HIS B 31 ND1	-1.555	INTRA-CHAIN
ARG B 30 NH1	HIS B 31 NE2	4.522	INTRA-CHAIN
ARG B 30 NH2	HIS B 31 NE2	3.837	INTRA-CHAIN
HIS B 31 ND1	ASP A 13 OD1	-2.131	INTER-CHAIN
HIS B 31 ND1	ASP A 23 OD1	-3.155	INTER-CHAIN
HIS B 31 ND1	ASP B 23 OD1	-1.404	INTRA-CHAIN
HIS B 31 ND1	ASP B 26 OD1	-1.621	INTRA-CHAIN
HIS B 31 ND1	ARG B 30 NH1	3.841	INTRA-CHAIN
HIS B 31 NE2	ASP A 13 OD1	-1.771	INTER-CHAIN
HIS B 31 NE2	ASP A 23 OD1	-4.446	INTER-CHAIN
HIS B 31 NE2	ASP B 23 OD1	-1.630	INTRA-CHAIN
HIS B 31 NE2	ASP B 26 OD1	-1.807	INTRA-CHAIN
HIS B 31 NE2	ARG B 30 NH1	4.522	INTRA-CHAIN
HIS B 31 NE2	ARG A 30 NH1	2.294	INTER-CHAIN

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Hydrogen bonds:

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|Res1 type| Res1 No.| Chain1| Res2 type| Res2 No.| Chain2|
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|        D|       23|      A|         H|       31|      B|
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Protrusion Index:
HIS B 31 N	0.67
HIS B 31 CA	0.50
HIS B 31 C	0.51
HIS B 31 O	0.51
HIS B 31 CB	0.35
HIS B 31 CG	0.47
HIS B 31 ND1	0.54
HIS B 31 CD2	0.50
HIS B 31 CE1	0.68
HIS B 31 NE2	0.65

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Salt bridges:
ASP A 23	HIS B 31	2.720	INTER-CHAIN
ARG B 30	HIS B 31	2.929	INTRA-CHAIN

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Van der Waal's Interactions:
ALA A 19 CB 152	HIS B 31 NE2 888	-0.080	INTER-CHAIN
ASP A 23 OD2 178	HIS B 31 NE2 888	-1.800	INTER-CHAIN
VAL B 27 CG2 851	HIS B 31 NE2 888	-0.034	INTRA-CHAIN