Contacts of the helix formed by residues 3128 - 3133 (chain E) in PDB entry 1LDK
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 GLU3128 (chain E).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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2127D ILE* 4.4 6.4 - - + +
2128D LYS* 3.1 53.3 - - - +
2129D GLY 4.4 3.1 + - - -
3123E CYS 4.8 0.2 - - - +
3124E LEU* 3.6 13.6 - - + +
3125E CYS* 2.4 62.7 + - + +
3127E PRO* 1.3 65.6 - - + +
3129E LEU* 1.3 50.2 + - - +
3130E LEU 2.7 5.5 + - - -
3131E LYS* 2.6 51.7 + - - +
3132E VAL* 3.4 5.9 + - + +
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Residues in contact with LEU3129 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
3121E PHE* 3.6 28.7 - - + +
3124E LEU* 4.1 17.9 - - + +
3126E LEU* 2.8 28.7 + - + +
3128E GLU* 1.3 71.4 - - - +
3130E LEU* 1.3 57.3 + - - +
3131E LYS 3.2 0.4 - - - -
3132E VAL* 2.9 19.6 - - + +
3133E SER* 2.9 28.1 + - - -
3143E ALA* 4.2 11.7 - - + +
3148E LEU* 3.6 32.1 - - + -
3149E TRP* 3.6 34.8 - - + +
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Residues in contact with LEU3130 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
2132D PRO* 5.6 0.3 - - - +
3126E LEU 5.0 1.6 - - - +
3127E PRO* 2.9 25.6 + - + +
3128E GLU 2.7 1.0 + - - -
3129E LEU* 1.3 78.3 - - - +
3131E LYS* 1.3 65.4 + - + +
3133E SER* 3.1 21.3 - - - +
3134E GLY 4.0 2.1 + - - -
3149E TRP* 5.9 7.0 - - + -
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Residues in contact with LYS3131 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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2127D ILE* 3.2 21.0 + - + -
2129D GLY* 3.2 10.5 - - - +
2130D LYS 2.6 48.0 + - - +
2131D THR* 4.9 7.0 - - + -
2132D PRO* 3.6 27.9 - - + +
2135D ILE* 5.8 2.2 - - + -
3127E PRO 5.1 1.6 - - - +
3128E GLU* 2.6 35.9 + - - +
3130E LEU* 1.3 72.0 - - + +
3132E VAL* 1.3 66.9 - - + +
3133E SER 3.2 0.5 + - - -
3134E GLY 3.2 9.2 + - - -
3135E VAL* 3.9 4.1 - - - +
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Residues in contact with VAL3132 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
2127D ILE* 3.6 29.4 - - + +
3121E PHE* 4.5 10.1 - - + -
3124E LEU* 4.0 17.3 - - + -
3128E GLU* 4.6 2.5 - - + +
3129E LEU* 2.9 47.3 - - + +
3131E LYS* 1.3 78.2 - - - +
3133E SER* 1.3 56.3 + - - +
3134E GLY 2.7 12.8 + - - -
3135E VAL* 2.8 26.6 + - + +
3139E TRP* 3.9 32.9 - - + +
3143E ALA* 4.6 6.5 - - + -
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Residues in contact with SER3133 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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3129E LEU 2.9 21.1 + - - -
3130E LEU* 3.1 24.4 - - - +
3132E VAL* 1.3 76.6 - - - +
3134E GLY* 1.3 56.5 + - - +
3135E VAL 3.7 0.2 - - - -
3140E TYR* 3.5 44.8 + - - +
3143E ALA* 4.2 15.7 - - - +
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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