Contacts of the helix formed by residues 48 - 53 (chain i) in PDB entry 3J7Y
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 ASN 48 (chain i).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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45i ASP* 3.1 20.9 + - - +
46i ARG 3.5 3.8 + - - -
47i TRP* 1.3 77.6 - - - +
49i GLU* 1.3 74.9 + - - +
50i LYS* 3.1 37.0 + - - +
51i ARG* 3.1 25.8 + - - +
52i ALA* 2.7 33.4 + - - +
25q TYR* 4.2 1.8 - - - -
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Residues in contact with GLU 49 (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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48i ASN* 1.3 81.3 + - - +
50i LYS* 1.3 60.9 + - + +
52i ALA* 4.2 0.4 - - - -
53i MET* 3.7 24.0 + - - +
25q TYR* 3.0 58.7 + - + +
26q ARG 3.9 13.2 - - - +
28q ARG 5.9 0.2 + - - -
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Residues in contact with LYS 50 (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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1768A G 4.9 14.9 + - - +
232Y LYS* 5.6 6.3 - - - +
48i ASN* 3.1 29.7 + - + +
49i GLU* 1.3 80.2 - - + +
51i ARG* 1.3 68.0 + - + +
53i MET 3.4 4.9 - - - +
54i PHE* 3.1 27.3 + - - +
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Residues in contact with ARG 51 (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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2277A U 4.7 0.8 + - - -
2278A A 3.1 40.4 + - - +
2279A U 3.6 16.3 + - - +
251F HIS* 4.8 0.7 - - - -
255F LYS* 3.4 19.3 + - - +
44i VAL* 3.6 16.1 - - - +
45i ASP 3.3 19.1 + - - -
46i ARG* 3.4 42.0 - - - +
48i ASN* 3.1 27.1 + - - +
50i LYS* 1.3 84.6 - - + +
52i ALA* 1.3 66.3 + - - +
53i MET 3.2 1.9 + - - -
54i PHE* 3.4 17.3 + - + +
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Residues in contact with ALA 52 (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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238F LYS 4.4 0.2 - - - +
241F ASN* 3.6 18.2 - - - +
252F SER* 5.4 1.7 - - - -
255F LYS* 3.9 12.9 - - - +
256F HIS* 3.8 13.9 - - - -
47i TRP* 4.1 14.8 - - + -
48i ASN 2.7 23.0 + - - +
49i GLU 4.4 0.7 - - - +
51i ARG* 1.3 72.6 - - - +
53i MET* 1.3 69.3 + - + +
54i PHE 3.9 0.7 + - - +
56i VAL* 4.9 1.9 - - - +
25q TYR* 3.8 26.5 - - + -
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Residues in contact with MET 53 (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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241F ASN* 3.8 25.6 - - + -
242F LEU 3.6 13.0 - - - +
243F ILE* 4.1 7.0 - - + -
256F HIS* 5.4 0.4 - - - -
49i GLU* 3.7 31.1 + - - +
50i LYS 3.4 7.1 + - - -
51i ARG 3.2 0.6 - - - -
52i ALA* 1.3 89.6 - - + +
54i PHE* 1.3 60.8 + - - -
55i GLY 3.5 1.7 + - - -
56i VAL* 3.6 38.0 + - + +
25q TYR* 4.7 0.9 - - - +
26q ARG 4.3 7.6 - - - +
27q ALA* 3.6 37.5 - - + +
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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