Contacts of the helix formed by residues 550 - 558 (chain H) in PDB entry 4E2I
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 LYS 550 (chain H).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
118 GLU* 4.1 12.8 - - - +
148 ILE* 3.1 30.9 - - - +
396H CYS 3.6 0.2 + - - -
397H LEU 2.8 31.3 + - - +
398H LEU* 4.0 4.5 - - - +
399H PRO* 4.7 2.0 - - - +
430H SER* 5.4 0.6 + - - +
548H ARG* 2.7 33.4 + - + +
549H PRO* 1.3 73.4 - - - +
551H ASP* 1.3 62.7 + - - +
552H TYR* 3.0 38.0 + - + +
553H LEU* 3.6 27.9 + - + +
554H LYS* 3.6 15.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 551 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
398 GLU* 5.6 7.4 - - - +
549H PRO 4.7 5.9 - - - +
550H LYS* 1.3 70.8 - - - +
552H TYR* 1.3 60.5 + - - +
553H LEU 3.0 5.4 - - - -
554H LYS* 2.8 29.7 + - + +
555H HIS* 3.0 33.2 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with TYR 552 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
118 GLU* 3.9 10.1 - - - -
148 ILE* 3.6 3.8 - - - +
158 PHE* 3.3 40.8 - + - -
438 GLY* 6.4 3.6 - - - -
396H CYS 2.7 19.8 + - - -
550H LYS* 3.0 42.6 + - + +
551H ASP* 1.3 78.7 - - - +
553H LEU* 1.3 74.3 + - + +
555H HIS* 4.2 8.5 - - - -
556H CYS* 3.1 26.8 + - - +
619H VAL* 3.1 41.2 - - + +
620H ALA 3.8 14.4 - - - +
621H MET 4.8 1.3 - - - +
622H GLY* 3.9 6.1 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 553 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
393H TRP* 3.2 46.9 + - + +
396H CYS 3.4 23.1 - - - +
397H LEU* 3.6 27.1 - - + -
430H SER 4.5 6.3 - - - +
548H ARG 4.9 0.2 - - - +
550H LYS* 3.6 39.5 + - + +
551H ASP 3.0 0.6 - - - -
552H TYR* 1.3 92.6 - - + +
554H LYS* 1.3 66.0 + - - +
556H CYS* 3.2 15.0 - - - +
557H LEU* 3.2 10.8 + - - +
619H VAL* 4.1 2.7 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with LYS 554 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
550H LYS 3.6 6.4 + - - +
551H ASP* 2.8 17.9 + - - +
553H LEU* 1.3 79.6 - - - +
555H HIS* 1.3 80.3 + - + +
556H CYS 3.1 1.0 + - - -
557H LEU* 3.2 16.2 + - - +
558H GLU* 3.1 34.6 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 555 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
551H ASP* 3.0 39.9 + - + +
552H TYR* 4.1 3.8 - - - -
554H LYS* 1.3 94.5 - - + +
556H CYS* 1.3 62.1 + - - +
558H GLU* 2.9 43.6 + - - +
559H ARG* 3.3 7.8 + - - +
621H MET 5.6 1.3 - - - -
622H GLY* 2.9 36.9 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with CYS 556 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
393H TRP* 3.4 22.9 - - + -
552H TYR 3.1 22.1 + - - +
553H LEU* 3.2 8.5 - - - +
554H LYS 3.0 0.4 - - - -
555H HIS* 1.3 77.8 - - - +
557H LEU* 1.3 63.0 + - - +
559H ARG* 3.2 9.2 + - - -
560H SER* 3.1 21.2 + - - -
563H LEU* 5.3 0.2 - - - -
619H VAL* 4.0 13.0 - - + -
622H GLY 4.2 1.3 - - - -
623H ILE 3.8 18.0 - - - +
625H VAL* 3.4 33.7 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 557 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
393H TRP* 3.7 37.2 - - + +
553H LEU 3.6 9.6 - - - +
554H LYS* 3.2 9.9 + - - +
556H CYS* 1.3 74.9 - - - +
558H GLU* 1.3 56.7 + - - +
559H ARG 3.0 6.0 + - - -
560H SER* 3.2 11.1 + - - +
561H GLU* 2.8 21.1 + - - +
563H LEU* 3.7 38.6 - - + -
564H LEU* 4.1 37.6 - - + +
569H ILE* 4.3 6.7 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 558 (chain H).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
554H LYS* 3.1 31.7 + - + +
555H HIS* 2.9 43.9 + - - +
556H CYS 3.1 0.6 - - - -
557H LEU* 1.3 78.0 - - - +
559H ARG* 1.3 70.3 + - - +
561H GLU* 3.3 14.0 - - - +
----------------------------------------------------------
Back to top of page
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
------------------------------------------------------------
Atomic class I II III IV V VI VII VIII
------------------------------------------------------------
I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
------------------------------------------------------------
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