Contacts of the helix formed by residues 502 - 508 (chain C) in PDB entry 1XMI
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 ILE 502 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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501C THR* 1.3 73.3 - - - +
503C LYS* 1.3 57.7 + - - +
505C ASN* 3.1 8.3 + - - +
506C ILE* 2.9 48.5 + - + +
517C TYR* 4.7 0.4 - - - +
526C LEU* 5.3 2.5 - - + -
529C ASP* 5.7 2.5 - - + -
530C ILE* 4.3 26.0 - - + +
533C PHE* 3.7 23.6 - - + -
536C LYS 4.6 0.9 - - - +
537C ASP* 3.4 8.7 + - - +
539C ILE* 3.6 29.0 + - + -
541C LEU* 3.8 20.2 - - + +
548C LEU* 4.8 3.6 - - + -
556C ILE* 4.2 25.4 - - + -
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Residues in contact with LYS 503 (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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501C THR* 3.9 5.2 - - - +
502C ILE* 1.3 78.4 - - - +
504C GLU* 1.3 53.9 + - + +
506C ILE* 3.1 1.9 + - - +
507C ILE* 2.8 53.0 + - + +
512C TYR* 3.3 43.0 + - + -
517C TYR* 3.6 25.7 + - + +
537C ASP* 3.4 33.5 + - + +
538C ASN* 4.4 10.5 - - - +
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Residues in contact with GLU 504 (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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498C MET* 4.1 12.4 - - + +
499C PRO 4.9 0.6 - - - +
500C GLY* 3.4 12.3 - - - -
501C THR* 3.1 42.5 + - - +
503C LYS* 1.3 79.9 - - + +
505C ASN* 1.3 57.6 + - - +
507C ILE* 4.5 5.8 - - - -
508C ALA* 2.8 29.6 + - - -
509C GLY 4.5 1.1 + - - +
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Residues in contact with ASN 505 (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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497C ILE* 3.7 3.4 - - - -
498C MET* 2.7 58.4 + - - +
500C GLY* 3.7 10.3 + - - -
501C THR 2.8 20.5 + - - +
502C ILE* 3.1 11.2 + - - +
504C GLU* 1.3 79.4 - - - +
506C ILE* 1.3 59.4 - - - +
508C ALA* 4.0 2.9 + - - +
541C LEU* 3.7 12.7 - - - +
556C ILE* 4.1 12.8 - - + -
560C ARG* 2.7 49.1 + - - +
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Residues in contact with ILE 506 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
502C ILE* 2.9 38.5 + - + +
503C LYS 3.8 2.9 - - - +
505C ASN* 1.3 77.1 - - - +
507C ILE* 1.3 65.7 + - - +
508C ALA* 3.5 0.5 + - - +
517C TYR* 4.0 31.6 - - + +
520C VAL* 4.5 5.4 - - + -
521C ILE* 4.0 16.2 - - + -
526C LEU* 4.1 11.7 - - + -
556C ILE* 4.3 11.4 - - + +
559C ALA* 3.9 32.8 - - + +
560C ARG* 3.5 22.7 - - - +
563C TYR* 4.0 18.2 - - + +
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Residues in contact with ILE 507 (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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503C LYS* 2.8 34.2 + - + +
504C GLU* 4.2 4.0 - - - +
506C ILE* 1.3 72.9 - - - +
508C ALA* 1.3 66.8 + - - +
509C GLY 3.9 8.7 - - - +
510C VAL* 2.8 47.2 + - - +
511C SER 4.6 3.1 - - - -
512C TYR* 3.7 23.3 - - + +
517C TYR* 3.6 21.1 - - + -
563C TYR* 3.3 37.9 - - + +
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Residues in contact with ALA 508 (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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496C TRP* 6.4 0.4 - - + -
498C MET* 4.7 16.6 - - + -
504C GLU 2.8 20.7 + - - -
505C ASN 4.0 12.3 - - - +
506C ILE 3.3 0.6 - - - +
507C ILE* 1.3 74.3 - - - +
509C GLY* 1.3 57.8 + - - +
510C VAL* 3.0 9.9 + - - +
560C ARG* 4.1 19.1 - - + +
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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