Contacts of the helix formed by residues 16 - 22 (chain Q) in PDB entry 6L49
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 THR 16 (chain Q).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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-124I A 4.8 6.1 - - - +
-123I G 4.0 38.1 + - - +
-122I G 5.0 4.7 - - - +
126J G 4.7 2.2 - - - +
127J A 3.3 22.4 - - - +
128J G 4.8 0.7 - - - -
15Q LYS* 1.3 79.9 - - + +
17Q ARG* 1.3 60.2 + - - +
18Q SER* 4.0 9.8 + - - -
19Q SER* 2.4 40.0 + - - -
20Q ARG* 3.2 11.6 + - - +
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Residues in contact with ARG 17 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
126J G 4.5 7.1 - - - +
127J A 2.4 60.1 + - - +
128J G 3.9 18.8 - - - +
16Q THR* 1.3 70.4 - - - +
18Q SER* 1.3 58.3 + - - -
19Q SER 3.2 0.2 - - - -
20Q ARG* 3.5 14.6 - - - +
21Q ALA* 2.9 30.1 + - - +
27Q VAL* 3.4 21.7 - - + +
28Q GLY* 3.6 14.5 + - - -
31Q HIS* 3.2 47.5 + - - +
35Q ARG* 4.9 4.9 - - - +
118R TYR* 3.4 31.3 + - + +
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Residues in contact with SER 18 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
-122I G 4.6 8.7 + - - -
127J A 3.8 4.2 + - - -
16Q THR* 3.2 9.4 - - - -
17Q ARG* 1.3 79.3 - - - +
19Q SER* 1.3 57.5 + - - +
22Q GLY* 3.0 21.1 + - - -
23Q LEU 3.0 30.6 + - - +
24Q GLN 4.9 2.9 + - - -
25Q PHE 3.3 16.3 + - - -
26Q PRO* 3.4 15.2 - - - +
27Q VAL* 3.5 9.9 + - - +
37R TYR* 5.5 0.2 - - - -
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Residues in contact with SER 19 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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14Q ALA* 3.5 27.1 - - - +
15Q LYS 3.5 0.7 + - - -
16Q THR* 2.4 43.7 + - - -
18Q SER* 1.3 76.5 - - - +
20Q ARG* 1.3 61.3 + - - -
21Q ALA 3.3 0.4 - - - -
22Q GLY* 3.7 8.2 + - - +
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Residues in contact with ARG 20 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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128J G 2.8 63.1 + - - +
129J A 4.6 4.8 + - - -
14Q ALA* 4.2 16.4 + - + -
16Q THR 3.2 12.0 + - - +
17Q ARG* 3.2 20.1 + - - +
19Q SER* 1.3 76.5 - - - +
21Q ALA* 1.3 58.6 + - - +
22Q GLY 3.5 0.2 - - - -
117R LYS* 3.7 18.4 - - - +
118R TYR* 4.1 33.0 + - + -
121R ALA* 4.1 29.4 - - + +
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Residues in contact with ALA 21 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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17Q ARG 2.9 15.8 + - - +
18Q SER 4.3 0.4 - - - +
20Q ARG* 1.3 76.4 - - - +
22Q GLY* 1.3 62.4 + - - +
23Q LEU* 3.9 11.1 - - + +
27Q VAL* 3.8 15.5 - - + -
49Q VAL* 3.7 28.0 - - + -
114R ALA* 4.6 1.9 - - - +
117R LYS* 3.4 27.3 + - - +
118R TYR* 4.5 13.2 - - + +
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Residues in contact with GLY 22 (chain Q).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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18Q SER 3.0 8.1 + - - -
19Q SER* 3.7 7.9 + - - -
20Q ARG 3.5 2.2 - - - -
21Q ALA* 1.3 79.4 - - - +
23Q LEU* 1.3 65.4 + - - +
56Q GLU* 5.2 0.9 - - - +
117R LYS* 3.8 13.9 + - - -
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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