Contacts of the helix formed by residues 120 - 125 (chain T) in PDB entry 3MQT
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 120 (chain T).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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118T GLY 4.5 1.6 - - - +
119T VAL* 1.3 95.3 - - + +
121T ALA* 1.3 66.5 + - - +
122T TYR* 3.1 44.1 + - + +
123T LYS* 3.2 33.9 + - + +
124T LEU 3.9 1.0 + - - -
322T HIS* 3.8 7.0 - - + -
365T ASP* 3.6 25.6 - - + +
366T LYS 3.5 17.7 - - - +
368T GLY 3.6 0.2 - - - +
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Residues in contact with ALA 121 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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110T TYR* 4.0 18.1 - - + +
119T VAL 3.6 0.9 + - - -
120T PRO* 1.3 72.0 - - - +
122T TYR* 1.3 57.2 + - - +
124T LEU* 2.9 26.2 + - - +
125T MET* 3.1 22.6 + - + +
322T HIS* 3.4 9.3 - - + +
368T GLY* 2.7 31.3 + - - +
369T LEU* 3.8 18.8 - - + -
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Residues in contact with TYR 122 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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120T PRO* 3.1 30.0 + - + +
121T ALA* 1.3 72.8 - - - +
123T LYS* 1.3 72.4 + - + +
125T MET* 3.2 11.8 + - - -
126T GLY 3.4 0.5 + - - -
127T GLY* 2.8 21.7 + - - -
128T ALA* 3.6 31.1 - - + +
322T HIS* 2.9 41.3 + + - +
325T ILE* 3.6 22.2 - - + -
326T VAL* 3.5 9.5 - - + +
363T VAL* 4.2 15.3 - - + -
364T SER 4.0 11.2 - - - -
365T ASP* 4.0 11.6 - - + +
77X GLU* 3.5 20.1 + - - -
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Residues in contact with LYS 123 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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119T VAL* 4.1 11.4 - - + -
120T PRO* 3.2 38.5 + - + +
122T TYR* 1.3 91.1 + - + +
124T LEU* 1.3 60.6 + - - +
126T GLY* 3.2 15.9 + - - -
127T GLY* 3.8 7.7 + - - +
365T ASP* 5.8 1.3 - - - -
74X ASP* 3.1 36.5 + - - +
76X LEU* 3.7 32.0 - - + +
77X GLU* 3.2 30.0 + - + +
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Residues in contact with LEU 124 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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76T LEU* 4.0 21.1 - - + -
78T PHE* 3.9 27.7 - - + -
110T TYR* 3.9 15.8 - - + +
113T ALA* 3.8 16.6 - - + +
114T GLY* 3.3 36.6 - - - +
117T LEU* 4.2 7.4 - - + -
119T VAL* 3.9 20.2 - - + -
120T PRO 4.3 0.4 - - - +
121T ALA* 2.9 12.4 + - - +
123T LYS* 1.3 75.3 - - - +
125T MET* 1.3 56.0 + - - +
126T GLY 3.2 3.3 + - - -
293T LEU* 5.3 0.7 - - - +
76X LEU* 4.2 18.6 - - + -
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Residues in contact with MET 125 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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110T TYR* 4.1 11.9 - - + -
121T ALA* 3.1 23.4 + - + +
122T TYR* 3.2 6.9 + - - +
123T LYS 3.2 0.8 - - - -
124T LEU* 1.3 76.9 - - - +
126T GLY* 1.3 57.1 + - - +
127T GLY 3.5 1.6 - - - -
289T VAL* 3.8 42.2 - - + -
293T LEU* 3.8 24.2 - - + +
319T ALA 4.7 2.7 - - - +
322T HIS* 3.7 25.8 - - + +
323T PHE* 3.6 33.0 - - - +
326T VAL* 3.7 23.1 - - + +
369T LEU* 4.5 7.4 - - + -
79X ARG* 3.7 11.9 - - - -
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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