Contacts of the helix formed by residues 135 - 140 (chain B) in PDB entry 1TD2
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 HIS 135 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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91B GLU* 4.0 28.0 + - - -
94B LEU* 3.7 24.1 - - + +
131B PHE* 2.8 25.1 + + + +
133B VAL 3.6 0.6 - - - -
134B ARG* 1.3 114.0 + - + +
136B GLY* 1.3 65.7 + - - +
137B LEU 3.5 0.9 - - - -
138B PRO* 3.2 14.5 - - - +
139B ALA* 3.3 15.1 + - - +
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Residues in contact with GLY 136 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
94B LEU* 4.6 5.6 - - - -
109B TYR* 4.2 3.8 - - - -
111B CYS* 4.7 11.9 - - - -
131B PHE* 2.9 33.4 + - - -
132B HIS* 3.7 4.7 - - - -
135B HIS* 1.3 73.9 - - - +
137B LEU* 1.3 67.3 + - - +
139B ALA* 3.0 4.5 + - - +
140B SER* 3.0 24.8 + - - -
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Residues in contact with LEU 137 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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111B CYS* 5.0 0.4 - - - -
132B HIS* 2.7 20.2 + - - +
133B VAL 3.8 8.3 - - - +
136B GLY* 1.3 70.8 - - - +
138B PRO* 1.3 71.7 - - + +
140B SER* 3.0 19.1 + - - -
143B ILE* 3.8 26.3 - - + +
153B LEU* 4.2 22.9 - - + +
171B LEU* 3.9 29.2 - - + +
174B GLN* 3.4 30.1 - - + +
176B PRO* 3.4 33.0 - - + +
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Residues in contact with PRO 138 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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133B VAL 3.8 10.5 - - - +
134B ARG 3.4 17.9 - - - +
135B HIS* 3.2 20.0 - - - +
137B LEU* 1.3 98.9 - - + +
139B ALA* 1.3 56.9 + - - +
140B SER 3.6 0.9 + - - +
174B GLN* 3.3 32.1 - - + +
175B GLY* 4.1 7.8 - - - -
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Residues in contact with ALA 139 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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94B LEU* 3.7 26.9 - - + -
97B VAL* 5.1 4.0 - - + +
101B LYS* 4.5 9.7 + - - -
109B TYR* 3.5 14.7 - - + +
135B HIS 3.3 16.0 + - - +
136B GLY 3.0 3.9 + - - +
138B PRO* 1.3 79.1 - - - +
140B SER* 1.3 63.2 + - - +
141B ASP* 3.9 1.0 + - - +
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Residues in contact with SER 140 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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109B TYR* 3.6 10.3 - - - -
111B CYS* 3.7 18.2 - - - -
136B GLY 3.0 12.3 + - - -
137B LEU 3.0 16.0 + - - -
138B PRO 4.3 0.2 - - - +
139B ALA* 1.3 79.5 - - - +
141B ASP* 1.3 60.9 + - - +
142B ILE 3.6 14.6 - - - -
143B ILE* 3.8 10.6 - - - +
175B GLY* 3.4 5.4 - - - +
176B PRO* 3.1 34.5 - - - +
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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