Contacts of the helix formed by residues 121 - 128 (chain A) in PDB entry 6VSU
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 PRO 121 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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40A SER* 3.2 46.9 - - - +
43A LEU* 5.3 7.0 - - + -
44A ILE* 5.2 1.8 - - + -
71A PRO* 5.4 0.4 - - + -
119A ASP 3.5 8.0 - - - +
120A VAL* 1.3 81.5 - - + +
122A VAL* 1.3 63.9 + - - +
123A GLN 3.5 2.2 - - - -
124A GLU* 3.3 29.9 - - + +
125A ILE* 3.3 23.1 + - + +
43D LEU* 4.3 14.4 - - + -
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Residues in contact with VAL 122 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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70A VAL* 4.1 13.7 - - + -
71A PRO* 3.8 28.6 - - + +
72A LEU* 3.9 20.0 - - + -
120A VAL* 2.8 36.9 + - + +
121A PRO* 1.3 68.2 - - - +
123A GLN* 1.3 80.7 + - - +
124A GLU* 4.1 0.2 + - - -
125A ILE* 3.3 7.0 + - - +
126A ARG* 3.0 25.2 + - - +
135A LEU* 3.9 27.5 - - + +
139A ILE* 5.0 1.1 - - + -
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Residues in contact with GLN 123 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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71A PRO* 2.8 32.7 + - + +
72A LEU* 4.3 4.0 - - - +
73A GLY 4.9 1.2 - - - +
83A ALA* 4.5 11.2 - - + +
121A PRO 3.5 0.4 - - - -
122A VAL* 1.3 85.7 - - - +
124A GLU* 1.3 67.7 + - - +
126A ARG* 3.0 35.8 + - - +
127A ASP* 3.0 30.5 + - - +
90D ARG* 6.5 1.3 - - - -
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Residues in contact with GLU 124 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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36A VAL* 4.5 7.3 - - + +
121A PRO* 3.3 35.9 - - + +
122A VAL 3.1 0.2 - - - -
123A GLN* 1.3 84.0 + - - +
125A ILE* 1.3 66.2 + - + +
127A ASP* 3.4 15.9 + - - +
128A CYS* 3.6 14.0 + - - +
43D LEU* 5.4 0.7 - - + -
47D ARG* 2.8 51.0 + - - +
90D ARG* 5.9 0.3 - - - -
118D GLY* 4.1 5.6 - - - -
119D ASP* 3.8 26.5 + - - +
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Residues in contact with ILE 125 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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36A VAL* 4.4 9.0 - - + -
37A ILE* 4.7 11.2 - - + -
40A SER* 4.0 20.2 - - - +
120A VAL* 4.5 5.6 - - + -
121A PRO 3.3 19.3 + - - +
122A VAL 3.7 5.8 - - - +
124A GLU* 1.3 75.1 - - + +
126A ARG* 1.3 62.6 + - - +
128A CYS* 3.3 20.8 - - - -
130A VAL* 3.3 38.2 + - + +
135A LEU* 3.7 26.5 - - + -
138A VAL* 3.8 31.2 - - + -
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Residues in contact with ARG 126 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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73A GLY 5.9 0.2 - - - +
74A HIS* 3.5 57.2 + - + +
80A GLN* 4.6 5.5 + - - -
122A VAL* 3.0 19.1 + - - +
123A GLN* 3.0 38.5 + - - +
124A GLU 3.2 0.2 - - - -
125A ILE* 1.3 74.8 - - - +
127A ASP* 1.3 58.9 + - - +
129A GLY* 3.1 21.1 + - - -
130A VAL 4.1 9.2 + - - +
135A LEU* 4.0 17.7 - - + -
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Residues in contact with ASP 127 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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123A GLN 3.0 18.4 + - - +
124A GLU* 3.8 7.5 - - - +
125A ILE 3.3 1.0 - - - -
126A ARG* 1.3 77.3 - - - +
128A CYS* 1.3 58.7 + - - +
129A GLY* 3.2 3.7 + - - -
47D ARG* 5.4 5.7 - - - +
51D LYS* 2.8 41.7 + - - -
116D ASP* 4.0 20.2 - - - +
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Residues in contact with CYS 128 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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29A ILE* 5.2 5.4 - - - +
33A GLN* 2.8 37.0 + - + +
36A VAL* 4.1 19.7 - - + -
37A ILE* 6.0 0.2 - - - -
124A GLU 3.6 11.7 + - - +
125A ILE* 3.3 26.0 - - - -
126A ARG 3.2 1.4 - - - -
127A ASP* 1.3 79.5 + - - +
129A GLY* 1.3 52.0 + - - +
130A VAL* 3.7 15.5 - - - -
47D ARG* 5.6 3.4 - - + -
50D LEU* 3.8 28.5 - - + +
51D LYS* 5.4 2.0 - - - +
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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
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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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).
Please E-mail any
questions and/or suggestions concerning this page to
Vladimir.Sobolev@weizmann.ac.il