Contacts of the helix formed by residues 145 - 152 (chain I) in PDB entry 3IS7
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 GLY 145 (chain I).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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141I ILE 2.9 18.6 + - - -
142I GLN 4.2 2.0 + - - -
143I LYS 3.6 1.4 - - - -
144I VAL* 1.3 81.3 - - - +
146I LEU* 1.3 66.7 + - - -
147I GLU 3.2 2.5 - - - -
148I ASN 3.1 2.5 + - - -
149I TYR* 2.9 19.6 + - - +
147O GLU* 3.8 14.0 + - - -
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Residues in contact with LEU 146 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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143G LYS 5.7 1.8 - - - +
83I THR* 5.2 5.2 - - - -
84I GLN* 4.5 17.5 - - + +
141I ILE* 3.7 36.4 + - + +
145I GLY* 1.3 71.0 - - - -
147I GLU* 1.3 68.5 + - + +
149I TYR* 3.2 3.4 + - - +
150I LEU* 3.0 57.3 + - + +
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Residues in contact with GLU 147 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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142G GLN 4.7 4.5 - - - +
143G LYS 3.6 21.6 - - - +
144G VAL* 3.4 24.6 - - - +
145G GLY* 3.7 17.0 + - - -
148G ASN* 3.6 9.8 + - - +
145I GLY 3.2 1.0 + - - -
146I LEU* 1.3 82.3 - - + +
148I ASN* 1.3 57.6 + - - +
150I LEU* 3.5 0.4 + - - -
151I GLN* 3.0 27.7 + - - +
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Residues in contact with ASN 148 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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148G ASN* 2.9 22.7 + - - +
159G K 3.1 11.3 - - - -
144I VAL* 3.3 30.8 + - + +
145I GLY 3.1 1.8 + - - +
147I GLU* 1.3 76.7 - - - +
149I TYR* 1.3 66.4 + - - +
151I GLN* 3.3 0.5 + - - +
152I SER* 2.9 21.8 + - - -
147O GLU* 3.7 20.6 + - - +
148O ASN* 3.0 21.1 + - - +
151O GLN* 3.0 30.8 + - - +
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Residues in contact with TYR 149 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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40I LEU* 4.0 15.7 - - + +
83I THR* 4.4 15.9 - - + -
87I LEU* 4.4 1.0 - - + +
137I GLN* 2.4 59.0 + - + +
140I LEU* 3.9 21.3 - - + -
141I ILE* 3.6 31.6 - - + -
144I VAL* 3.7 11.4 - - + +
145I GLY 2.9 16.3 + - - +
146I LEU* 3.2 4.9 + - + +
148I ASN* 1.3 77.2 - - - +
150I LEU* 1.3 69.0 + - + +
152I SER* 3.4 6.0 + - - -
153I HIS* 2.7 56.9 + + - -
154O MET* 4.5 4.7 - - + -
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Residues in contact with LEU 150 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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143G LYS* 3.9 31.0 - - + +
144G VAL* 3.7 15.3 - - + -
37I LEU* 3.4 28.0 - - + +
40I LEU* 4.6 2.5 - - + -
83I THR* 3.5 38.6 - - + +
146I LEU* 3.0 40.7 + - + +
147I GLU 3.9 0.7 - - - +
149I TYR* 1.3 82.4 - - + +
151I GLN* 1.3 67.7 + - - +
153I HIS* 2.8 12.8 + - - -
154I MET* 3.3 8.3 + - - +
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Residues in contact with GLN 151 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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144G VAL* 3.5 12.4 - - + +
148G ASN* 2.8 41.1 + - + +
151G GLN* 2.8 24.1 + - - +
152G SER* 3.0 23.9 + - - +
159G K 2.9 14.2 - - - -
147I GLU 3.0 15.6 + - - +
148I ASN 3.3 6.7 - - - +
150I LEU* 1.3 75.5 - - - +
152I SER* 1.3 58.6 + - - +
153I HIS 3.0 4.3 + - - -
154I MET* 3.2 22.2 + - - +
155I HIS* 4.7 1.9 + - - -
151O GLN* 2.7 26.4 + - - +
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Residues in contact with SER 152 (chain I).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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39I ARG* 3.6 8.7 + - - -
148I ASN 2.9 9.6 + - - -
149I TYR 3.7 6.7 - - - -
150I LEU 3.1 0.4 - - - -
151I GLN* 1.3 75.5 - - - +
153I HIS* 1.3 58.5 + - - +
154I MET 3.5 0.7 - - - -
155I HIS 4.7 2.5 - - - +
151O GLN* 3.0 35.3 + - - +
154O MET* 3.9 25.0 - - - -
155O HIS* 3.3 25.4 - - - -
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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