Structural features of residue 31 in chain A

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Electrostatic Interactions:
ASP A 23 OD1	HIS A 31 ND1	-1.404	INTRA-CHAIN
ASP A 23 OD2	HIS A 31 ND1	-1.384	INTRA-CHAIN
ARG A 30 NH1	HIS A 31 NE2	8.406	INTRA-CHAIN
ARG A 30 NH2	HIS A 31 NE2	7.257	INTRA-CHAIN
HIS A 31 ND1	ASP B 13 OD1	-2.133	INTER-CHAIN
HIS A 31 ND1	ASP A 23 OD1	-1.404	INTRA-CHAIN
HIS A 31 ND1	ASP B 26 OD1	-1.605	INTER-CHAIN
HIS A 31 ND1	ARG A 30 NH1	5.806	INTRA-CHAIN
HIS A 31 NE2	ASP B 13 OD1	-1.781	INTER-CHAIN
HIS A 31 NE2	ASP A 23 OD1	-1.615	INTRA-CHAIN
HIS A 31 NE2	ASP B 26 OD1	-1.814	INTER-CHAIN
HIS A 31 NE2	ARG B 30 NH1	2.178	INTER-CHAIN
HIS A 31 NE2	ARG A 30 NH1	8.406	INTRA-CHAIN
ASP B 13 OD1	HIS A 31 ND1	-2.133	INTER-CHAIN
ASP B 13 OD2	HIS A 31 ND1	-1.808	INTER-CHAIN
ASP B 26 OD1	HIS A 31 ND1	-1.605	INTER-CHAIN
ASP B 26 OD2	HIS A 31 ND1	-1.782	INTER-CHAIN
ARG B 30 NH1	HIS A 31 NE2	2.178	INTER-CHAIN
ARG B 30 NH2	HIS A 31 NE2	2.452	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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|        H|       31|      A|         D|       23|      B|
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Protrusion Index:
HIS A 31 N	0.86
HIS A 31 CA	0.68
HIS A 31 C	0.67
HIS A 31 O	0.64
HIS A 31 CB	0.45
HIS A 31 CG	0.59
HIS A 31 ND1	0.60
HIS A 31 CD2	0.60
HIS A 31 CE1	0.72
HIS A 31 NE2	0.69

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Van der Waal's Interactions:
VAL A 27 CG2 216	HIS A 31 NE2 253	-0.036	INTRA-CHAIN
ARG A 30 NH2 243	HIS A 31 NE2 253	-0.127	INTRA-CHAIN