Contacts of the helix formed by residues 226 - 262 (chain S) in PDB entry 5JPQ
Residue contacts within the protein are
derived with the CSU software (Sobolev V., Sorokine A.,
Prilusky J., Abola E.E. and Edelman M. (1999) Automated
analysis of interatomic contacts in proteins.
Bioinformatics, 15, 327-332). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with SER 226 (chain S).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
225S ILE* 1.3 77.8 - - - +
227S GLU* 1.3 66.2 + - - +
228S ASP* 3.2 12.3 - - - -
229S ASP* 3.4 12.6 + - - +
230S LEU* 3.2 20.8 + - - +
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Residues in contact with GLU 227 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
226S SER* 1.3 71.7 - - - +
228S ASP* 1.3 66.4 + - - +
230S LEU* 4.0 6.4 - - - +
231S SER* 3.2 24.8 + - - -
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Residues in contact with ASP 228 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
226S SER* 3.2 8.2 - - - -
227S GLU* 1.3 79.8 - - - +
229S ASP* 1.3 62.3 + - - +
231S SER* 3.5 3.3 + - - -
232S ALA* 3.3 20.1 + - - +
253T TYR* 5.7 3.8 - - + +
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Residues in contact with ASP 229 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
225S ILE* 4.5 10.5 - - + -
226S SER* 3.4 21.9 + - - +
227S GLU 3.3 0.4 - - - -
228S ASP* 1.3 80.2 - - - +
230S LEU* 1.3 62.1 + - - +
232S ALA* 3.4 19.0 - - - +
233S MET* 3.4 8.3 + - - +
139T LEU* 5.6 10.3 - - + -
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Residues in contact with LEU 230 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
190S GLY* 5.0 20.6 - - - -
191S ASP* 5.1 3.4 - - + +
225S ILE* 5.8 2.0 - - + +
226S SER 3.2 12.4 + - - +
227S GLU* 4.0 7.0 - - - +
228S ASP 3.3 0.2 - - - -
229S ASP* 1.3 76.9 - - - +
231S SER* 1.3 61.4 + - - +
233S MET* 3.1 10.2 + - - +
234S ARG* 2.8 27.1 + - - +
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Residues in contact with SER 231 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
227S GLU 3.2 17.0 + - - -
228S ASP* 4.2 3.1 - - - -
230S LEU* 1.3 77.6 - - - +
232S ALA* 1.3 61.6 + - - +
234S ARG* 3.5 10.4 - - - +
235S MET* 3.0 23.6 + - - +
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Residues in contact with ALA 232 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
228S ASP 3.3 13.2 + - - +
229S ASP* 3.4 13.7 - - - +
230S LEU 3.1 0.2 - - - -
231S SER* 1.3 77.8 - - - +
233S MET* 1.3 61.9 + - - +
235S MET* 3.4 17.1 + - - +
236S ILE* 4.0 3.1 + - - +
143T ALA* 6.1 4.9 - - + -
250T LEU* 6.3 1.8 - - - -
253T TYR* 4.8 17.9 - - + -
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Residues in contact with MET 233 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
161S LEU* 5.7 1.7 - - - +
164S TRP* 5.3 11.7 - - + -
165S TYR* 5.2 18.2 - - + -
186S VAL* 5.7 5.6 - - + +
229S ASP 3.4 7.0 + - - +
230S LEU* 3.1 10.6 + - - +
232S ALA* 1.3 78.2 - - - +
234S ARG* 1.3 63.4 + - - +
236S ILE* 3.0 20.2 + - - +
237S ALA* 3.3 10.0 + - - +
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Residues in contact with ARG 234 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
186S VAL* 4.2 17.3 - - - +
187S SER* 5.0 7.8 - - - +
190S GLY* 6.1 2.5 - - - -
230S LEU 2.8 19.4 + - - +
231S SER* 3.2 12.3 + - - +
233S MET* 1.3 69.7 - - - +
235S MET* 1.3 59.3 + - - +
237S ALA* 3.3 9.7 + - - +
238S ASN* 3.0 29.8 + - - +
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Residues in contact with MET 235 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
231S SER 3.0 11.1 + - - +
232S ALA* 3.5 13.0 - - - +
233S MET 3.2 0.6 + - - -
234S ARG* 1.3 77.4 - - - +
236S ILE* 1.3 61.4 + - - +
238S ASN* 3.5 5.5 + - - +
239S THR* 3.2 22.0 + - - -
246T ILE* 4.8 21.4 - - + +
249T ASN* 6.3 2.2 - - + -
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Residues in contact with ILE 236 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
157S PHE* 5.3 13.0 - - + +
160S ARG* 6.3 1.6 - - + -
161S LEU* 4.9 16.8 - - + -
232S ALA 4.0 2.8 + - - +
233S MET* 3.0 12.5 + - - +
235S MET* 1.3 75.3 - - - +
237S ALA* 1.3 60.3 + - - +
239S THR* 3.1 8.5 + - - -
240S ILE* 2.9 29.2 + - - +
146T ALA* 5.6 9.9 - - + -
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Residues in contact with ALA 237 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
161S LEU* 5.5 7.7 - - + +
183S ALA* 3.7 30.7 - - - +
186S VAL* 4.1 12.3 - - + -
187S SER* 3.9 17.9 - - - +
233S MET 3.3 4.7 + - - +
234S ARG* 3.3 12.7 + - - +
236S ILE* 1.3 77.9 - - - +
238S ASN* 1.3 56.4 + - - +
240S ILE* 3.3 9.4 + - - +
241S LEU* 3.1 26.5 + - - +
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Residues in contact with ASN 238 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
187S SER* 4.7 8.2 - - - -
234S ARG 3.0 16.8 + - - +
235S MET* 3.9 5.8 - - - +
237S ALA* 1.3 74.7 - - - +
239S THR* 1.3 60.4 + - - +
241S LEU* 3.4 6.8 + - - +
242S ASP* 2.9 28.4 + - - +
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Residues in contact with THR 239 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
235S MET 3.2 13.1 + - - -
236S ILE* 3.1 12.2 + - - -
238S ASN* 1.3 74.5 - - - +
240S ILE* 1.3 65.8 + - - +
242S ASP* 3.4 7.4 + - - +
243S LEU* 3.0 24.6 + - - +
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Residues in contact with ILE 240 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
154S ILE* 5.6 11.2 - - + +
157S PHE* 5.0 15.0 - - + +
158S SER* 5.6 6.7 - - - +
183S ALA* 4.1 16.4 - - + -
236S ILE 2.9 13.5 + - - +
237S ALA* 3.5 9.9 - - - +
239S THR* 1.3 76.0 - - - +
241S LEU* 1.3 63.5 + - - +
243S LEU* 3.1 17.1 + - - +
244S TYR* 3.1 13.2 + - - +
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Residues in contact with LEU 241 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
183S ALA* 5.0 6.2 - - + +
184S THR* 6.0 3.6 - - - +
187S SER* 5.8 4.9 - - - -
237S ALA 3.1 15.4 + - - +
238S ASN* 3.8 7.9 - - - +
239S THR 3.3 0.2 - - - -
240S ILE* 1.3 76.1 - - - +
242S ASP* 1.3 64.3 + - - +
244S TYR* 3.1 17.5 + - - +
245S ASN* 3.3 10.4 + - - +
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Residues in contact with ASP 242 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
238S ASN 2.9 15.5 + - - +
239S THR* 3.5 12.6 - - - +
241S LEU* 1.3 74.6 - - - +
243S LEU* 1.3 56.8 + - - +
245S ASN* 3.0 11.5 + - - +
246S ILE* 3.0 26.9 + - - +
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Residues in contact with LEU 243 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
150S ILE* 5.0 14.8 - - + +
153S THR* 6.2 2.2 - - - -
154S ILE* 5.2 16.2 - - + +
239S THR 3.0 10.5 + - - +
240S ILE* 3.1 11.0 + - - +
242S ASP* 1.3 78.4 - - - +
244S TYR* 1.3 57.1 + - - +
246S ILE* 3.7 8.4 - - - +
247S ARG* 2.8 30.0 + - - +
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Residues in contact with TYR 244 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
154S ILE* 6.1 0.4 - - - +
180S GLU* 5.3 12.8 - - + -
240S ILE 3.1 9.1 + - - +
241S LEU* 3.1 13.5 + - - +
243S LEU* 1.3 76.7 - - - +
245S ASN* 1.3 60.9 + - - +
247S ARG* 3.4 7.4 + - - +
248S ARG* 3.2 22.5 + - - +
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Residues in contact with ASN 245 (chain S).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
241S LEU 3.3 6.2 + - - +
242S ASP* 3.0 11.7 + - - +
244S TYR* 1.3 75.8 - - - +
246S ILE* 1.3 66.1 + - - +
248S ARG* 3.3 5.9 + - - +
249S ASN* 2.9 24.7 + - - +
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Residues in contact with ILE 246 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
242S ASP 3.0 12.9 + - - +
243S LEU* 3.8 11.9 - - - +
245S ASN* 1.3 76.3 - - - +
247S ARG* 1.3 63.7 + - - +
249S ASN* 3.4 8.1 + - - +
250S LEU* 2.9 24.9 + - - +
235T MET* 4.9 20.2 - - + +
239T THR* 6.4 2.2 - - - -
----------------------------------------------------------
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Residues in contact with ARG 247 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
147S MET* 5.9 5.1 - - + +
150S ILE* 5.1 13.9 - - + -
151S ASP 6.1 0.2 - - - +
243S LEU 2.8 18.0 + - - +
244S TYR* 3.6 8.7 - - - +
245S ASN 3.2 0.2 - - - -
246S ILE* 1.3 76.3 - - - +
248S ARG* 1.3 57.0 + - - +
250S LEU* 3.0 8.4 + - - +
251S ASN* 2.8 28.7 + - - +
----------------------------------------------------------
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Residues in contact with ARG 248 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
244S TYR 3.2 13.1 + - - +
245S ASN* 3.8 5.6 - - - +
247S ARG* 1.3 78.4 - - - +
249S ASN* 1.3 62.5 + - - +
251S ASN* 3.4 8.7 + - - +
252S ASN* 3.2 22.2 + - - +
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Residues in contact with ASN 249 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
245S ASN 2.9 17.9 + - - +
246S ILE* 3.5 9.4 - - - +
248S ARG* 1.3 78.5 - - - +
250S LEU* 1.3 55.4 + - - +
252S ASN* 3.5 6.1 + - - +
253S TYR* 3.0 26.7 + - - +
----------------------------------------------------------
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Residues in contact with LEU 250 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
143S ALA* 5.3 11.2 - - + +
146S ALA* 6.6 0.2 - - + -
147S MET* 5.0 18.4 - - + -
246S ILE 2.9 14.2 + - - +
247S ARG* 3.0 11.2 + - - +
249S ASN* 1.3 73.2 - - - +
251S ASN* 1.3 60.2 + - - +
253S TYR* 3.8 6.9 - - - +
254S LEU* 2.9 31.1 + - - +
232T ALA* 6.4 0.9 - - - -
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Residues in contact with ASN 251 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
147S MET* 6.2 0.2 - - - +
247S ARG 2.8 12.4 + - - +
248S ARG* 3.7 12.6 - - - +
249S ASN 3.3 0.2 - - - -
250S LEU* 1.3 76.0 - - - +
252S ASN* 1.3 56.5 + - - +
254S LEU* 3.3 6.6 + - - +
255S GLU* 2.8 30.5 + - - +
271S PRO* 5.0 1.9 - - - +
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Residues in contact with ASN 252 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
248S ARG 3.2 11.2 + - - +
249S ASN* 3.8 8.3 - - - +
250S LEU 3.3 0.2 - - - -
251S ASN* 1.3 77.1 - - - +
253S TYR* 1.3 65.4 + - - +
255S GLU* 3.4 8.2 + - - +
256S GLY* 3.2 17.8 + - - -
----------------------------------------------------------
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Residues in contact with TYR 253 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
249S ASN 3.0 17.7 + - - +
250S LEU* 3.8 8.1 - - - +
251S ASN 3.4 0.2 - - - -
252S ASN* 1.3 75.2 - - - +
254S LEU* 1.3 62.7 + - - +
256S GLY* 3.2 11.6 + - - -
257S VAL* 3.2 13.2 + - - +
228T ASP 5.6 2.7 - - - +
232T ALA* 4.8 18.2 - - + -
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Residues in contact with LEU 254 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
140S ALA* 5.8 4.6 - - - +
143S ALA* 5.0 16.5 - - + +
144S VAL* 5.6 5.6 - - + +
250S LEU 2.9 18.9 + - - +
251S ASN* 3.5 7.4 - - - +
252S ASN 3.2 0.2 - - - -
253S TYR* 1.3 76.2 - - - +
255S GLU* 1.3 56.9 + - - +
257S VAL* 3.1 7.3 + - - +
258S MET* 2.9 34.6 + - + +
271S PRO* 4.4 8.7 - - + -
272S ALA* 5.7 3.4 - - - +
275S ALA* 5.9 5.6 - - + -
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Residues in contact with GLU 255 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
251S ASN 2.8 19.5 + - - +
252S ASN* 3.6 9.0 - - - +
254S LEU* 1.3 71.5 - - - +
256S GLY* 1.3 61.4 + - - +
258S MET* 4.1 0.5 - - - +
259S LYS* 3.2 26.2 + - - +
271S PRO* 3.7 21.4 - - + +
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Residues in contact with GLY 256 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
252S ASN 3.2 6.7 + - - -
253S TYR 3.2 7.8 + - - -
254S LEU 3.2 1.0 - - - -
255S GLU* 1.3 80.1 - - - +
257S VAL* 1.3 60.3 + - - +
259S LYS* 3.7 3.4 + - - +
260S GLU* 3.3 21.1 + - - +
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Residues in contact with VAL 257 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
139S LEU* 5.6 4.3 - - + -
140S ALA* 4.7 22.9 - - + +
253S TYR 3.2 9.8 + - - +
254S LEU* 3.1 8.3 + - - +
256S GLY* 1.3 75.7 - - - +
258S MET* 1.3 54.2 + - - +
260S GLU* 3.3 7.0 + - - +
261S VAL* 2.7 38.1 + - + +
----------------------------------------------------------
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Residues in contact with MET 258 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
140S ALA* 5.4 7.6 - - + +
254S LEU* 2.9 16.2 + - + +
255S GLU 4.1 2.7 - - - +
257S VAL* 1.3 76.1 - - - +
259S LYS* 1.3 59.8 + - - +
261S VAL* 5.1 1.8 - - - -
262S ALA* 2.8 39.5 + - + +
266S THR* 4.4 8.1 - - - -
271S PRO* 4.1 30.5 - - + +
275S ALA* 5.6 6.1 - - + +
----------------------------------------------------------
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Residues in contact with LYS 259 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
255S GLU 3.2 17.8 + - - +
256S GLY* 4.1 3.1 - - - +
258S MET* 1.3 73.8 - - - +
260S GLU* 1.3 65.7 + - - +
263S PRO* 3.4 31.2 - - + +
266S THR* 4.7 6.7 - - - -
----------------------------------------------------------
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Residues in contact with GLU 260 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
256S GLY 3.3 13.1 + - - +
257S VAL* 3.3 10.9 + - - +
259S LYS* 1.3 82.4 - - - +
261S VAL* 1.3 59.7 + - + +
263S PRO* 5.0 0.9 - - - +
----------------------------------------------------------
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Residues in contact with VAL 261 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
137S ASP* 4.7 26.9 - - + +
140S ALA* 5.6 4.5 - - + -
257S VAL* 2.7 20.7 + - + +
258S MET* 4.8 1.8 - - - +
260S GLU* 1.3 75.5 - - + +
262S ALA* 1.3 62.1 + - + +
263S PRO 4.1 0.4 - - - -
284S LEU* 5.4 5.9 - - - +
352S ASP* 4.6 11.3 - - - +
----------------------------------------------------------
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Residues in contact with ALA 262 (chain S).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
258S MET* 2.8 22.3 + - + +
261S VAL* 1.3 76.9 - - + +
263S PRO* 1.4 58.4 - - - +
264S ASN 3.3 2.9 + - - -
265S VAL* 3.4 15.9 + - + -
266S THR* 3.0 23.6 + - - -
284S LEU* 5.7 7.9 - - + -
352S ASP* 4.3 15.7 - - + -
----------------------------------------------------------
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
Atomic class I II III IV V VI VII VIII
------------------------------------------------------------
I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
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