Contacts of the helix formed by residues 623 - 628 (chain B) in PDB entry 2XBB
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 ASN 623 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
621B ASN* 2.7 19.9 + - - +
622B PRO* 1.3 89.5 - - - +
624B SER* 1.3 62.6 + - - +
625B GLY 3.3 2.7 - - - -
626B LEU* 3.2 38.7 + - + +
627B CYS* 3.3 17.8 + - - -
704B GLU* 5.5 2.6 - - - +
705B GLU 4.3 7.7 + - - -
706B LEU* 3.7 28.4 - - - +
707B PHE* 5.0 7.2 - - + -
744B ARG* 5.4 5.0 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with SER 624 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
606B GLY 3.1 22.6 + - - +
607B LEU* 3.4 3.0 + - - +
621B ASN 2.6 21.4 + - - -
622B PRO 3.3 2.6 + - - -
623B ASN* 1.3 76.8 - - - +
625B GLY* 1.3 59.9 + - - +
627B CYS* 3.1 3.9 + - - +
628B ASN* 2.9 29.1 + - - +
631B HIS* 3.2 24.5 - - - +
635B PHE* 3.3 26.7 - - - -
748B GLN* 3.9 4.7 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLY 625 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
622B PRO 5.0 0.4 + - - -
623B ASN 3.3 0.8 - - - -
624B SER* 1.3 78.7 - - - +
626B LEU* 1.3 64.8 + - - +
628B ASN 3.7 11.9 - - - +
629B GLU* 4.0 7.7 + - - +
631B HIS* 3.2 32.1 + - - -
748B GLN* 4.9 0.6 - - - +
42D ARG* 5.5 0.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 626 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
623B ASN* 3.2 36.9 + - + +
624B SER 3.1 1.0 - - - -
625B GLY* 1.3 80.1 - - - +
627B CYS* 1.3 64.5 + - - +
706B LEU* 4.2 19.3 - - + -
707B PHE* 4.5 14.8 - - + -
42D ARG* 4.7 0.8 + - - -
44D ILE* 4.0 11.3 - - + +
47D GLY 5.4 10.8 - - - +
49D GLN* 3.5 18.9 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with CYS 627 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
605B TYR 3.8 11.4 - - - +
606B GLY* 3.9 18.6 - - - -
621B ASN* 3.9 10.5 - - - -
623B ASN* 3.4 14.1 - - - -
624B SER 3.1 6.3 + - - +
626B LEU* 1.3 79.6 - - - +
628B ASN* 1.3 70.9 + - - +
707B PHE* 3.8 24.0 - - - -
8D LEU* 4.0 9.4 - - - -
42D ARG* 3.2 21.1 + - - -
49D GLN* 4.9 0.2 - - - -
70D VAL* 3.6 25.2 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 628 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
605B TYR 3.0 22.2 + - - +
607B LEU* 5.2 0.4 - - + -
624B SER 2.9 18.2 + - - +
625B GLY 3.7 5.1 - - - +
626B LEU 3.5 0.6 - - - -
627B CYS* 1.3 87.0 + - - +
629B GLU* 1.3 64.7 + - - +
630B ASP 3.2 5.0 + - - +
631B HIS* 3.2 18.0 + - + +
42D ARG* 3.3 20.5 + - - +
70D VAL* 4.1 0.4 - - - +
71D LEU 3.0 22.0 + - - -
72D ARG* 3.7 0.7 - - - -
73D LEU* 2.7 52.9 + - + +
----------------------------------------------------------
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