Contacts of the helix formed by residues 348 - 356 (chain C) in PDB entry 2QPA
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 MET 348 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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344C LYS 4.0 18.6 + - - +
345C ASP* 3.4 11.5 + - - +
346C ALA 2.6 5.5 + - - -
347C LEU* 1.3 79.9 - - + +
349C GLN* 1.3 63.5 + - - +
350C PRO* 3.3 4.7 - - - -
351C ILE* 3.3 28.8 + - + +
352C ARG* 3.1 20.5 + - + +
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Residues in contact with GLN 349 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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345C ASP* 3.6 24.7 + - - +
346C ALA* 2.5 28.7 + - - +
348C MET* 1.3 70.5 - - - +
350C PRO* 1.3 65.6 - - - +
352C ARG* 3.1 16.3 + - - +
353C LYS* 2.9 21.8 + - - +
405C ASP* 3.2 33.7 - - - +
408C LYS* 5.3 9.4 - - + +
409C ALA* 5.7 0.2 - - + -
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Residues in contact with PRO 350 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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346C ALA 3.5 5.8 - - - +
347C LEU 3.4 17.3 - - - +
348C MET 3.3 2.0 - - - -
349C GLN* 1.3 89.4 - - + +
351C ILE* 1.3 66.5 + - + +
353C LYS* 2.7 33.3 + - + +
354C ILE* 3.3 9.0 + - - +
398C GLU* 4.9 9.4 - - + -
399C PRO* 3.6 38.4 - - + +
400C ASP 5.3 2.9 - - - +
401C LEU* 4.1 21.1 - - + -
405C ASP* 4.5 3.8 - - - +
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Residues in contact with ILE 351 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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347C LEU 5.2 2.7 - - - +
348C MET* 3.3 31.1 + - + +
350C PRO* 1.3 83.6 - - + +
352C ARG* 1.3 59.3 + - - +
354C ILE* 3.5 15.9 - - + +
355C GLN* 2.9 39.9 - - + +
398C GLU* 6.4 1.1 - - + -
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Residues in contact with ARG 352 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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348C MET* 3.1 12.6 + - + +
349C GLN* 3.1 27.8 + - - +
350C PRO 3.0 1.0 - - - -
351C ILE* 1.3 76.9 - - - +
353C LYS* 1.3 64.6 + - - +
354C ILE 3.3 0.6 + - - -
355C GLN* 3.8 13.2 + - - +
356C SER* 3.1 23.9 + - - -
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Residues in contact with LYS 353 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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349C GLN* 2.9 10.9 + - - +
350C PRO* 2.7 17.2 + - + +
352C ARG* 1.3 78.8 - - - +
354C ILE* 1.3 59.9 + - + +
356C SER* 3.4 6.9 + - - -
357C ALA* 3.3 19.8 + - - +
375C PRO* 4.4 13.4 - - + +
399C PRO* 5.0 3.4 - - + -
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Residues in contact with ILE 354 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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350C PRO 3.8 11.7 - - - +
351C ILE* 3.5 18.6 - - + +
353C LYS* 1.3 73.8 - - - +
355C GLN* 1.3 89.3 + - + +
356C SER 3.0 4.0 - - - -
357C ALA* 2.6 37.4 + - - +
360C PHE* 4.1 14.3 - - + -
375C PRO* 4.1 24.5 - - + -
388C TRP* 3.7 31.8 - - + -
399C PRO* 4.5 11.7 - - + -
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Residues in contact with GLN 355 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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351C ILE* 2.9 41.4 + - + +
352C ARG* 4.0 12.3 - - - +
353C LYS 3.7 0.4 - - - -
354C ILE* 1.3 94.7 - - + +
356C SER* 1.3 57.3 + - - +
357C ALA 3.4 1.4 - - - +
388C TRP* 3.9 22.9 + - + +
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Residues in contact with SER 356 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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352C ARG 3.1 17.1 + - - -
353C LYS* 3.4 8.1 + - - -
355C GLN* 1.3 77.8 - - - +
357C ALA* 1.3 64.6 + - - +
358C THR* 3.5 12.3 + - - +
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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