Strucure Library: Difference between revisions

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HSR1 is placed to the human MHC class I region. It is known to be highly homologous to a putative GTP binding protein like MMR1 from mouse. These are also known to represent a new subfamily of GTP binding proteins of prokaryote and eukaryote members.
HSR1 is placed to the human MHC class I region. It is known to be highly homologous to a putative GTP binding protein like MMR1 from mouse. These are also known to represent a new subfamily of GTP binding proteins of prokaryote and eukaryote members.


[[Image:MG2+.jpg]]
[[Image:MG2.jpg]]


[[Image:MG1.jpg]]
[[Image:MG1.jpg]]

Revision as of 01:28, 12 June 2007

Dali Analysis

Nucleotide Sequence

Protein Sequence

Protein Structure

The asymmetric unit of Bacillus subtilis YlqF protein consists of a polymer containing 282 amino acids. It also contains ligands which are a magnesium ion and a Phosphoaminophosphonic acid-guanylate ester. The protein has been refined at 2 angstroms to a crystallographic R factor of 21.6% and free R factor of 25%. MolProbity Ramachandran analysis of YlqF shows that 96.5% of all residues lie in the favoured regions and 98.8% of all residues lie in the allowed regions.


Parameters Resolution[Å]

2.00

R factor, %

21.6

Free R factor, %

25.0

Space Group

P 21 21 21

Unit Cell Length[Å]

Angles [°]

a

alpha

36.75

90.00

b

beta

68.57

90.00

c

gamma

105.57

90.00

Table. Crystal parameters and refinement statistics

Ramachandran.jpg Ramachandran 1.jpg

Figure. MolProbity Ramachandran analysis of YlqF


Cartoon.jpg

Figure. Structure of YlqF showing helix, sheet, and loop. Image was generated using the program PyMol (DeLano, 2002)

Ligand.jpg

Figure. Structure of YlqF showing ligands. The image was obtained from PDB.


The secondary structure of YlqF mainly consists of 50% helix (13 helices; 142 residues) and 10% beta sheets (6 strands; 31 residues)(see Figure). YlqF protein consists of two domains (Figure). One domain contains Rossmann fold with α/β class. This domain possesses 1-177 residues, and forms a 3-layer sandwich structure. The other one is referred to as a conserved hypothetical protein with mainly α class. This possesses 178-282 residues, and forms a orthogonal bundle structure. YlqF is also classified as a signalling protein. The molecular weight of the protein is 31986 Da.


Secondary structure.png

Pi helix.gif = pi helix, 310helix.jpg = 310 helix, Sheet.jpg = extended strand, Turn.jpg = turn, Alpha.jpg = alpha helix,

Greyed out residues have no structural information

Figure 6. Sequence and Secondary Structure

Domain1.jpg

Figure. Structure of YlqF showing two domains. Image was generated using the program PyMol (DeLano, 2002)


Structure classification of proteins (SCOP) classified YlqF. The results of Pfam classification described YlqF as GTPase of unknown function, Rhomboid family, and catalytic domain of alpha amylase.

Class

Alpha and beta proteins

Fold

P-loop containing

nucleoside triphosphate hydrolases

Superfamily

P-loop containing

nucleoside triphosphate hydrolases

Family

G proteins

Domain

Probable GTPase YlqF

Species

Bacillus subtilis

InterProScan Results

InterPro: IPR005289 MG442 This is a GTP binding domain. This was found in many different families including Ras GTPase superfamily, HSR1-related GTP binding protein. And they all play different functions.

InterPro: IPR002917 MMR_HSR1 HSR1 is placed to the human MHC class I region. It is known to be highly homologous to a putative GTP binding protein like MMR1 from mouse. These are also known to represent a new subfamily of GTP binding proteins of prokaryote and eukaryote members.

MG2.jpg

MG1.jpg

Figure. Total residue interactions for magnesium ion


GNP.jpg

GNP1.jpg

Figure. Total residue interactions for Phosphoaminophosphonic acid-guanylate ester (GNP)