Structural features of residue 4 in chain A

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Electrostatic Interactions:
HIS A 4 ND1	ARG A 6 NH1	4.559	INTRA-CHAIN
HIS A 4 ND1	HIS A 69 NE2	1.510	INTRA-CHAIN
HIS A 4 ND1	HIS B 181 NE2	1.560	INTER-CHAIN
HIS A 4 ND1	ASP C 221 OD1	-3.749	INTER-CHAIN
HIS A 4 ND1	ASP C 223 OD1	-1.598	INTER-CHAIN
HIS A 4 NE2	ARG A 6 NH1	4.044	INTRA-CHAIN
HIS A 4 NE2	HIS A 69 ND1	0.729	INTRA-CHAIN
HIS A 4 NE2	HIS A 69 NE2	1.733	INTRA-CHAIN
HIS A 4 NE2	ASP C 221 OD1	-3.027	INTER-CHAIN
HIS A 4 NE2	ASP C 223 OD1	-1.412	INTER-CHAIN
HIS A 4 NE2	HIS F 253 ND1	0.672	INTER-CHAIN
ARG A 6 NH1	HIS A 4 NE2	4.044	INTRA-CHAIN
ARG A 6 NH2	HIS A 4 NE2	3.635	INTRA-CHAIN
HIS A 69 ND1	HIS A 4 NE2	1.640	INTRA-CHAIN
HIS A 69 NE2	HIS A 4 ND1	0.671	INTRA-CHAIN
HIS A 69 NE2	HIS A 4 NE2	1.733	INTRA-CHAIN
HIS B 181 NE2	HIS A 4 ND1	0.693	INTER-CHAIN
ASP C 221 OD1	HIS A 4 ND1	-3.749	INTER-CHAIN
ASP C 221 OD2	HIS A 4 ND1	-2.970	INTER-CHAIN
ASP C 223 OD1	HIS A 4 ND1	-1.598	INTER-CHAIN
ASP C 223 OD2	HIS A 4 ND1	-1.475	INTER-CHAIN
HIS F 253 ND1	HIS A 4 NE2	1.512	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|      221|      C|         H|        4|      A|
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Van der Waal's Interactions:
HIS A 4 NE2 38	LEU A 8 CD2 73	-0.008	INTRA-CHAIN
HIS A 4 NE2 38	LEU B 43 CD2 2466	-0.019	INTER-CHAIN
HIS A 4 NE2 38	GLU A 71 OE2 572	-1.984	INTRA-CHAIN
HIS A 4 NE2 38	SER C 220 OG 5960	-0.079	INTER-CHAIN
PHE B 2 CZ 2127	HIS A 4 NE2 38	-0.223	INTER-CHAIN