Contacts of the helix formed by residues 549 - 554 (chain A) in PDB entry 3IAY
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 SER 549 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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118A ILE 5.2 0.2 + - - -
119A ASP* 3.9 26.8 + - - -
460A LEU* 4.6 7.2 - - - +
461A GLN 6.1 0.4 - - - -
547A PRO* 3.1 2.9 - - - +
548A PHE* 1.3 84.2 - - - +
550A TYR* 1.3 77.1 + - - +
551A LEU 3.2 0.6 + - - -
552A LEU* 3.9 2.9 + - - +
553A ALA* 3.4 25.2 + - - +
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Residues in contact with TYR 550 (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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253A ALA* 5.2 7.1 - - - +
255A THR* 5.5 4.7 - - - +
256A LEU* 4.0 27.0 + - + +
546A VAL* 3.8 21.5 - - + -
547A PRO* 2.9 41.7 + - + +
549A SER* 1.3 91.2 + - - +
551A LEU* 1.3 60.2 + - - +
552A LEU 3.4 0.2 - - - -
553A ALA* 4.8 0.2 - - - -
554A ARG* 2.8 65.1 + - + +
555A GLY 5.1 1.2 - - - +
558A ILE* 3.6 38.5 - - + +
559A LYS* 6.1 0.2 - - + -
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Residues in contact with LEU 551 (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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470A ARG* 2.7 26.7 + - - -
537A TYR* 3.2 64.9 + - + +
540A MET* 3.8 26.7 - - + -
541A ALA* 4.0 8.5 - - + +
546A VAL* 3.6 26.0 - - + -
548A PHE* 3.1 17.7 + - + +
550A TYR* 1.3 78.5 - - - +
552A LEU* 1.3 62.1 + - - +
559A LYS* 4.3 15.0 - - + +
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Residues in contact with LEU 552 (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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441A PHE* 5.9 0.2 - - - -
461A GLN 4.8 4.9 - - - +
462A LEU* 3.9 37.9 - - + -
463A ASP 4.4 3.6 - - - +
466A GLN* 4.0 22.8 + - + +
467A PHE* 4.0 23.3 - - - +
470A ARG* 3.2 27.1 + - + +
537A TYR* 3.5 35.2 - - + +
548A PHE* 4.5 4.2 + - + -
549A SER 3.9 4.3 + - - +
551A LEU* 1.3 77.5 - - - +
553A ALA* 1.3 60.5 + - - +
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Residues in contact with ALA 553 (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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441A PHE* 3.7 17.4 - - - -
453A ASN* 4.3 24.2 + - - +
470A ARG* 4.3 1.6 - - - -
549A SER* 3.4 19.2 + - - +
552A LEU* 1.3 79.3 - - - +
554A ARG* 1.3 69.7 + - + +
3T A 4.3 0.9 + - - -
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Residues in contact with ARG 554 (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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441A PHE* 3.8 5.8 - - - -
470A ARG* 2.9 27.5 + - - -
550A TYR* 2.8 60.2 + - - +
551A LEU 3.7 0.2 - - - +
553A ALA* 1.3 90.9 - - + +
555A GLY* 1.3 63.0 + - - +
558A ILE* 3.9 33.9 - - + +
1T T 3.9 15.4 + - - -
2T A 4.0 11.0 + - - -
3T A 2.9 35.6 + - - +
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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