Contacts of the helix formed by residues 771 - 778 (chain A) in PDB entry 3T6A
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 ASP 771 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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543A LEU* 5.0 4.4 - - - +
547A ASN* 6.0 2.0 - - - +
551A VAL* 6.1 1.1 - - + -
555A HIS* 2.8 19.0 + - + +
769A GLN 3.8 0.8 + - - +
770A PRO* 1.3 71.1 - - - +
772A GLU* 1.3 56.5 + - - +
773A GLU* 3.4 9.8 + - - +
774A MET* 3.0 35.6 + - + +
775A ASN* 2.8 34.2 + - - +
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Residues in contact with GLU 772 (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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523A LYS* 3.4 36.4 + - - +
524A PHE* 3.5 17.6 - - + -
770A PRO 3.8 3.4 + - - -
771A ASP* 1.3 73.9 + - - +
773A GLU* 1.3 64.7 + - - +
775A ASN* 3.1 8.9 + - - +
776A GLU* 2.9 29.3 + - + +
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Residues in contact with GLU 773 (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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524A PHE* 3.5 50.7 - - + +
539A ARG* 3.0 53.0 + - - +
543A LEU* 3.3 19.9 - - + +
771A ASP* 3.4 7.9 + - - +
772A GLU* 1.3 79.4 - - - +
774A MET* 1.3 63.8 + - - +
776A GLU* 3.0 3.8 + - - +
777A ILE* 3.0 22.8 + - + +
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Residues in contact with MET 774 (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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543A LEU* 4.3 17.8 - - + +
544A PHE* 5.9 1.3 - - - -
547A ASN* 3.1 46.0 - - + +
551A VAL* 4.8 7.0 - - + -
552A ILE* 4.7 17.7 - - + -
555A HIS* 3.0 40.4 - - + +
771A ASP* 3.0 25.1 + - + +
773A GLU* 1.3 75.9 - - - +
775A ASN* 1.3 62.2 + - - +
777A ILE* 3.3 27.7 - - - +
778A CYS* 3.3 13.6 + - - -
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Residues in contact with ASN 775 (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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555A HIS* 3.6 15.2 + - + -
558A SER* 4.6 5.9 + - - -
559A MET* 5.1 2.8 - - - +
562A ARG* 3.2 36.7 + - - +
770A PRO* 4.1 20.4 - - + +
771A ASP 2.8 14.1 + - - +
772A GLU* 3.3 11.9 - - - +
774A MET* 1.3 77.5 - - - +
776A GLU* 1.3 65.4 + - - +
778A CYS* 3.2 18.6 + - - +
779A LYS* 3.6 19.9 + - - +
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Residues in contact with GLU 776 (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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520A PHE* 3.7 9.5 - - - -
521A GLU 4.4 0.9 - - - +
522A SER* 2.8 31.1 + - - +
523A LYS 4.9 0.8 + - - -
524A PHE* 3.7 27.4 - - + -
772A GLU* 2.9 23.7 + - + +
773A GLU 3.0 7.6 + - - +
775A ASN* 1.3 80.6 - - - +
777A ILE* 1.3 59.0 + - - +
779A LYS* 2.9 59.0 + - - +
782A PHE* 3.4 19.2 - - + +
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Residues in contact with ILE 777 (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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540A ALA* 3.3 42.2 - - + +
543A LEU* 4.2 14.4 - - + -
773A GLU 3.0 13.8 + - - +
774A MET* 3.3 25.1 - - - +
776A GLU* 1.3 76.4 - - - +
778A CYS* 1.3 62.1 + - - +
779A LYS 3.2 1.3 - - - -
782A PHE* 3.8 26.9 - - + -
783A GLN* 3.0 25.5 + - + +
786A LEU* 4.4 9.2 - - + -
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Residues in contact with CYS 778 (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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552A ILE* 5.1 0.9 - - - -
555A HIS* 3.7 32.8 - - - +
556A VAL* 4.2 15.0 - - - -
559A MET* 3.5 20.1 - - + +
601A ARG* 2.7 35.3 + - - +
774A MET* 3.3 17.9 + - - -
775A ASN* 3.2 11.6 + - - +
776A GLU 3.1 1.0 - - - -
777A ILE* 1.3 80.0 - - - +
779A LYS* 1.3 54.2 + - - +
783A GLN* 3.2 10.7 + - - +
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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
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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