1PAQ - JenaLib

Title :   CRYSTAL STRUCTURE OF THE CATALYTIC FRAGMENT OF EUKARYOTIC INITIATION FACTOR 2B EPSILON

Authors :   T. Boesen, G. R. Andersen, G. D. Pavitt

Date :   14 May 03 (Deposition) - 10 Feb 04 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.30

Chains :   Asym./Biol. Unit : A

Keywords :   Heat Repeat, Aa Motif, Translation (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   T. Boesen, S. S. Mohammad, G. D. Pavitt, G. R. Andersen
Structure Of The Catalytic Fragment Of Translation Initiation Factor 2B And Identification Of A Critically Important Catalytic Residue.
J. Biol. Chem. V. 279 10584 2004
PubMed-ID: 14681227 | Reference-DOI: 10.1074/JBC.M311055200
(for further references see the PDB file header)

Compounds

Molecule 1 - TRANSLATION INITIATION FACTOR EIF-2B EPSILON SUBUNIT
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PETEIF2BE-CTD
	Expression System Strain	:	BL21(DE3)ROSETTA
	Expression System Taxid	:	562
	Expression System Vector	:	PET24D
	Expression System Vector Type	:	PLASMID
	Fragment	:	CATALYTIC DOMAIN, RESIDUES (524-712)
	Gene	:	GCD6 OR TIF225 OR YDR211W OR YD8142.12 OR YD8142B.03
	Organism Common	:	BAKER'S YEAST
	Organism Scientific	:	SACCHAROMYCES CEREVISIAE
	Organism Taxid	:	4932
	Synonym	:	EIF-2B GDP-GTP EXCHANGE FACTOR, GUANINE NUCLEOTIDE EXCHANGE FACTOR SUBUNIT GCD6, GCD COMPLEX SUBUNIT GCD6

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (1, 5)

Sites (0, 0)

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (1, 1)

Sequences/Alignments

Asymmetric/Biological Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
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Chain A from PDB  Type:PROTEIN  Length:161
 aligned with EI2BE_YEAST | P32501 from UniProtKB/Swiss-Prot  Length:712

    Alignment length:161
                                   553       563       573       583       593       603       613       623       633       643       653       663       673       683       693       703 
          EI2BE_YEAST   544 DFEKEGIATVERAMENNHDLDTALLELNTLRMSMNVTYHEVRIATITALLRRVYHFIATQTLGPKDAVVKVFNQWGLLFKRQAFDEEEYIDLMNIIMEKIVEQSFDKPDLILFSALVSLYDNDIIEEDVIYKWWDNVSTDPRYDEVKKLTVKWVEWLQNAD 704
               SCOP domains d1paqa_ A: Translation initiation factor eIF-2b epsilon                                                                                                           SCOP domains
               CATH domains 1paqA00 A:544-704  [code=1.25.40.180, no name defined]                                                                                                            CATH domains
               Pfam domains -------------------------------------------------------------------------------------W2-1paqA01 A:629-704                                                         Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhh...hhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.1  PDB: A:544-704 UniProt: 1-712 [INCOMPLETE]                                                                                                              Transcript 1
                 1paq A 544 DFEKEGIATVERAmENNHDLDTALLELNTLRmSmNVTYHEVRIATITALLRRVYHFIATQTLGPKDAVVKVFNQWGLLFKRQAFDEEEYIDLmNIImEKIVEQSFDKPDLILFSALVSLYDNDIIEEDVIYKWWDNVSTDPRYDEVKKLTVKWVEWLQNAD 704
                                   553   |   563       573 | |   583       593       603       613       623       633  |   |643       653       663       673       683       693       703 
                                       557-MSE           575-MSE                                                      636-MSE                                                                
                                                           577-MSE                                                        640-MSE

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	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Classification and Annotation

SCOP Domains (1, 1)

CATH Domains (1, 1)

Pfam Domains (1, 1)

Gene Ontology (11, 11)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (EI2BE_YEAST | P32501)

molecular function
	GO:0005085	guanyl-nucleotide exchange factor activity	Stimulates the exchange of guanyl nucleotides associated with a GTPase. Under normal cellular physiological conditions, the concentration of GTP is higher than that of GDP, favoring the replacement of GDP by GTP in association with the GTPase.
	GO:0016779	nucleotidyltransferase activity	Catalysis of the transfer of a nucleotidyl group to a reactant.
	GO:0003743	translation initiation factor activity	Functions in the initiation of ribosome-mediated translation of mRNA into a polypeptide.
biological process
	GO:0009058	biosynthetic process	The chemical reactions and pathways resulting in the formation of substances; typically the energy-requiring part of metabolism in which simpler substances are transformed into more complex ones.
	GO:0043547	positive regulation of GTPase activity	Any process that activates or increases the activity of a GTPase.
	GO:0006417	regulation of translation	Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteins by the translation of mRNA or circRNA.
	GO:0006446	regulation of translational initiation	Any process that modulates the frequency, rate or extent of translational initiation.
	GO:0006412	translation	The cellular metabolic process in which a protein is formed, using the sequence of a mature mRNA or circRNA molecule to specify the sequence of amino acids in a polypeptide chain. Translation is mediated by the ribosome, and begins with the formation of a ternary complex between aminoacylated initiator methionine tRNA, GTP, and initiation factor 2, which subsequently associates with the small subunit of the ribosome and an mRNA or circRNA. Translation ends with the release of a polypeptide chain from the ribosome.
	GO:0006413	translational initiation	The process preceding formation of the peptide bond between the first two amino acids of a protein. This includes the formation of a complex of the ribosome, mRNA or circRNA, and an initiation complex that contains the first aminoacyl-tRNA.
cellular component
	GO:0005851	eukaryotic translation initiation factor 2B complex	A multisubunit guanine nucleotide exchange factor which catalyzes the exchange of GDP bound to initiation factor eIF2 for GTP, generating active eIF2-GTP. In humans, it is composed of five subunits, alpha, beta, delta, gamma and epsilon.
	GO:0032045	guanyl-nucleotide exchange factor complex	A protein complex that stimulates the exchange of guanyl nucleotides associated with a GTPase.

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