Contacts of the helix formed by residues 639 - 644 (chain A) in PDB entry 6T8B
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 THR 639 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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601A MET* 5.1 5.5 - - + +
609A GLU* 3.1 29.6 + - + +
635A VAL* 4.0 20.9 - - + +
637A VAL 4.2 0.2 - - - -
638A ILE* 1.3 75.7 - - - +
640A GLY* 1.3 66.3 + - - +
641A LEU* 4.1 9.6 + - - +
642A ILE* 2.9 32.6 + - - +
643A LYS 3.3 7.4 + - - -
636B ASP* 5.5 5.4 - - - -
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Residues in contact with GLY 640 (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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635A VAL* 4.3 12.2 - - - +
638A ILE 3.6 1.9 + - - -
639A THR* 1.3 72.8 - - - +
641A LEU* 1.3 56.7 + - - +
643A LYS* 3.9 10.3 - - - -
644A ALA* 2.9 34.0 + - - +
632B ARG* 3.6 9.7 - - - +
636B ASP* 5.6 1.4 + - - -
659B ASP* 4.6 1.6 - - - +
14G T 3.6 22.9 + - - -
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Residues in contact with LEU 641 (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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613A ALA* 4.9 9.1 - - + -
617A GLN* 3.5 27.8 - - - +
639A THR* 3.0 9.4 + - - +
640A GLY* 1.3 76.6 - - - +
642A ILE* 1.3 59.7 + - + +
644A ALA* 4.1 1.6 + - - +
645A ASN* 2.8 30.3 + - - +
598B ALA* 5.2 0.2 - - + -
602B MET* 4.6 11.4 - - + -
631B GLN 3.7 22.9 - - - +
632B ARG* 4.2 17.0 - - + +
634B SER* 5.2 2.0 - - - +
636B ASP* 4.7 22.1 + - + +
637B VAL* 3.7 27.8 - - + -
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Residues in contact with ILE 642 (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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597A PHE* 4.6 7.6 - - + -
601A MET* 5.4 1.3 - - - -
609A GLU* 4.1 23.1 - - + +
612A ILE* 4.0 30.3 - - + -
613A ALA* 3.9 21.8 - - + +
616A ALA* 4.5 7.4 - - + -
628A LEU* 4.3 2.7 - - + -
638A ILE* 3.7 19.1 - - + -
639A THR* 2.9 25.3 + - - +
641A LEU* 1.3 76.1 - - + +
643A LYS* 1.3 61.4 + - - +
644A ALA 3.1 1.3 - - - -
645A ASN* 2.8 24.5 + - - +
646A ILE* 3.3 29.3 + - + +
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Residues in contact with LYS 643 (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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463A LEU* 4.4 15.0 - - + -
633A PRO* 3.0 25.6 + - + +
634A SER 5.1 1.1 - - - -
635A VAL* 5.3 3.3 - - + +
638A ILE* 3.6 34.5 - - + +
639A THR 3.3 2.9 + - - +
640A GLY* 4.0 10.8 - - - +
642A ILE* 1.3 78.3 - - - +
644A ALA* 1.3 61.3 + - - +
645A ASN 3.2 0.5 + - - -
646A ILE* 3.3 18.5 + - - +
649A ARG* 3.0 38.9 + - - +
662A THR* 2.9 28.1 + - - +
655B SER* 4.2 2.1 + - - -
656B SER* 5.6 2.9 - - - +
659B ASP* 5.0 1.3 - - - +
13G A 4.1 18.4 + - - -
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Residues in contact with ALA 644 (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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640A GLY 2.9 19.4 + - - +
641A LEU 4.3 4.0 - - - +
642A ILE 3.1 0.2 - - - -
643A LYS* 1.3 76.7 - - - +
645A ASN* 1.3 62.3 + - - +
646A ILE 3.5 0.4 - - - -
467B THR* 3.1 31.0 - - + +
631B GLN* 5.6 0.6 - - + +
632B ARG* 3.5 34.8 - - + +
655B SER* 3.5 5.7 + - - -
659B ASP* 3.5 19.4 + - + +
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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