Structural features of residue 55 in chain A

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Electrostatic Interactions:
GLU A 53 OE1	GLU A 55 OE1	3.727	INTRA-CHAIN
GLU A 53 OE1	GLU A 55 OE2	3.791	INTRA-CHAIN
GLU A 53 OE2	GLU A 55 OE1	4.372	INTRA-CHAIN
GLU A 53 OE2	GLU A 55 OE2	4.323	INTRA-CHAIN
GLU A 55 OE1	ASP B 20 OD2	4.484	INTER-CHAIN
GLU A 55 OE1	LYS B 21 NZ	-4.758	INTER-CHAIN
GLU A 55 OE1	GLU A 53 OE1	3.727	INTRA-CHAIN
GLU A 55 OE1	GLU A 53 OE2	4.372	INTRA-CHAIN
GLU A 55 OE1	LYS A 61 NZ	-3.622	INTRA-CHAIN
GLU A 55 OE2	ASP B 20 OD2	3.803	INTER-CHAIN
GLU A 55 OE2	LYS B 21 NZ	-3.873	INTER-CHAIN
GLU A 55 OE2	GLU A 53 OE1	3.791	INTRA-CHAIN
GLU A 55 OE2	GLU A 53 OE2	4.323	INTRA-CHAIN
GLU A 55 OE2	LYS A 61 NZ	-4.023	INTRA-CHAIN
GLU A 55 OE2	ASP B 194 OD2	2.778	INTER-CHAIN
GLU A 55 OE2	GLU B 196 OE2	2.780	INTER-CHAIN
LYS A 61 NZ	GLU A 55 OE2	-4.023	INTRA-CHAIN
ASP B 20 OD1	GLU A 55 OE1	5.463	INTER-CHAIN
ASP B 20 OD2	GLU A 55 OE1	4.484	INTER-CHAIN
LYS B 21 NZ	GLU A 55 OE2	-3.873	INTER-CHAIN
GLU B 196 OE2	GLU A 55 OE2	2.780	INTER-CHAIN
ASP B 212 OD1	GLU A 55 OE1	2.731	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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|        K|       21|      B|         E|       55|      A|
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Protrusion Index:
GLU A 55 N	0.34
GLU A 55 CA	0.40
GLU A 55 C	0.29
GLU A 55 O	0.33
GLU A 55 CB	0.72
GLU A 55 CG	0.88
GLU A 55 CD	1.15
GLU A 55 OE1	1.29
GLU A 55 OE2	1.45

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Salt bridges:
LYS B 21	GLU A 55	2.871	INTER-CHAIN

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Van der Waal's Interactions:
GLU A 55 OE2 454	GLY A 59 O 480	-0.226	INTRA-CHAIN
GLU A 55 OE2 454	LYS A 61 NZ 496	-0.224	INTRA-CHAIN
LYS B 21 NZ 1863	GLU A 55 OE2 454	-0.206	INTER-CHAIN