chi_angles_atoms

氨基酸中决定侧链扭转角的原子基团的名称，每个氨基酸最多有四个侧链扭转角，其中ALA与GLY没有侧链扭转角；每个扭转角由4个原子基团的位置决定（二面角）。

key	value
ALA	[]
ARG	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD’], [‘CB’, ‘CG’, ‘CD’, ‘NE’], [‘CG’, ‘CD’, ‘NE’, ‘CZ’]]
ASN	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘OD1’]]
ASP	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘OD1’]]
CYS	[[‘N’, ‘CA’, ‘CB’, ‘SG’]]
GLN	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD’], [‘CB’, ‘CG’, ‘CD’, ‘OE1’]]
GLU	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD’], [‘CB’, ‘CG’, ‘CD’, ‘OE1’]]
GLY	[]
HIS	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘ND1’]]
ILE	[[‘N’, ‘CA’, ‘CB’, ‘CG1’], [‘CA’, ‘CB’, ‘CG1’, ‘CD1’]]
LEU	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD1’]]
LYS	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD’], [‘CB’, ‘CG’, ‘CD’, ‘CE’], [‘CG’, ‘CD’, ‘CE’, ‘NZ’]]
MET	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘SD’], [‘CB’, ‘CG’, ‘SD’, ‘CE’]]
PHE	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD1’]]
PRO	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD’]]
SER	[[‘N’, ‘CA’, ‘CB’, ‘OG’]]
THR	[[‘N’, ‘CA’, ‘CB’, ‘OG1’]]
TRP	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD1’]]
TYR	[[‘N’, ‘CA’, ‘CB’, ‘CG’], [‘CA’, ‘CB’, ‘CG’, ‘CD1’]]
VAL	[[‘N’, ‘CA’, ‘CB’, ‘CG1’]]