1OBG - JenaLib

Title :   SAICAR-SYNTHASE COMPLEXED WITH ATP

Authors :   S. V. Antonyuk, A. I. Grebenko, V. M. Levdikov, D. V. Urusova, W. R. Melik-Adamyan, V. S. Lamzin, K. Wilson

Date :   30 Jan 03 (Deposition) - 06 Mar 03 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.05

Chains :   Asym./Biol. Unit : A

Keywords :   Synthetase, Atp Binding Protein, Phosphoribosylaminoimidazolesuccinocarboxamide (Saicar) Synthase, Purine Biosynthesis, Ligase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   S. V. Antonyuk, A. I. Grebenko, V. M. Levdikov, D. V. Urusova, W. R. Melik-Adamyan, V. S. Lamzin, K. Wilson
X-Ray Structure Of Saicar-Synthase Complexed With Atp
Kristallografiya V. 46 620 2001
PubMed: search
(for further references see the PDB file header)

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 5)

Sites (5, 5)

Asymmetric Unit (5, 5)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	ARG A:122 , SER A:128 , ARG A:242 , HOH A:2150 , HOH A:2269 , HOH A:2270	BINDING SITE FOR RESIDUE SO4 A 308
2	AC2	SOFTWARE	ASP A:239 , ASP A:259 , LYS A:260 , TYR A:292	BINDING SITE FOR RESIDUE MG A 310
3	AC3	SOFTWARE	GLY A:18 , LYS A:19 , VAL A:20 , ARG A:21 , AMP A:307	BINDING SITE FOR RESIDUE SO4 A 311
4	AC4	SOFTWARE	ARG A:21 , ILE A:23 , PHE A:33 , HIS A:75 , HIS A:110 , LYS A:111 , HIS A:112 , LEU A:114 , LYS A:164 , GLU A:219 , VAL A:232 , ASP A:233 , SO4 A:311 , HOH A:2264 , HOH A:2266 , HOH A:2267	BINDING SITE FOR RESIDUE AMP A 307
5	AC5	SOFTWARE	GLU A:62 , LEU A:76 , VAL A:77 , ILE A:79 , ILE A:85 , SER A:106 , LEU A:107 , LEU A:108 , GLU A:253 , HOH A:2271 , HOH A:2272 , HOH A:2273	BINDING SITE FOR RESIDUE AMP A 309

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (2, 2)

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)
	SAPs(SNPs)	PROSITE motifs	Exons
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Chain A from PDB  Type:PROTEIN  Length:305
 aligned with PUR7_YEAST | P27616 from UniProtKB/Swiss-Prot  Length:306

    Alignment length:305
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301     
           PUR7_YEAST     2 SITKTELDGILPLVARGKVRDIYEVDAGTLLFVATDRISAYDVIMENSIPEKGILLTKLSEFWFKFLSNDVRNHLVDIAPGKTIFDYLPAKLSEPKYKTQLEDRSLLVHKHKLIPLEVIVRGYITGSAWKEYVKTGTVHGLKQPQGLKESQEFPEPIFTPSTKAEQGEHDENISPAQAAELVGEDLSRRVAELAVKLYSKCKDYAKEKGIIIADTKFEFGIDEKTNEIILVDEVLTPDSSRFWNGASYKVGESQDSYDKQFLRDWLTANKLNGVNGVKMPQDIVDRTRAKYIEAYETLTGSKWSH 306
               SCOP domains d1obga_ A: SAICAR synthase                                                                                                                                                                                                                                                                                        SCOP domains
               CATH domains 1obgA01 A:2-112 Phosphorylase Kinase; domain 1                                                                 1obgA02 A:113-258 ATP-grasp fold, B domain                                                                                                        ------------------------------------------------ CATH domains
               Pfam domains ---------SAICAR_synt-1obgA01 A:11-284                                                                                                                                                                                                                                                      ---------------------- Pfam domains
         Sec.struct. author ............eeee...eeeeeee..eeeeee....ee..ee......hhhhhhhhhhhhhhhhh....ee.........hhhhhhhhhhhhhhhhhhhh..eeeee..ee..eeeeeeee.hhhhhhhhhhhhee..ee.........eeeeeee..ee...........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheeeeeeee.eee......eee.........eeeee..............hhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------SAICAR_SYNTHETA------------------------------------------------------------------------------------SAICAR_SY------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.1  PDB: A:2-306 UniProt: 1-306 [INCOMPLETE]                                                                                                                                                                                                                                                                Transcript 1
                 1obg A   2 SITKTELDGILPLVARGKVRDIYEVDAGTLLFVATDRISAYDVIMENSIPEKGILLTKLSEFWFKFLSNDVRNHLVDIAPGKTIFDYLPAKLSEPKYKTQLEDRSLLVHKHKLIPLEVIVRGYITGSAWKEYVKTGTVHGLKQPQGLKESQEFPEPIFTPSTKAEQGEHDENISPAQAAELVGEDLSRRVAELAVKLYSKCKDYAKEKGIIIADTKFEFGIDEKTNEIILVDEVLTPDSSRFWNGASYKVGESQDSYDKQFLRDWLTANKLNGVNGVKMPQDIVDRTRAKYIEAYETLTGSKWSH 306
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	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 (2, 2)

Pfam Domains (1, 1)

Gene Ontology (9, 9)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (PUR7_YEAST | P27616)

molecular function
	GO:0005524	ATP binding	Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
	GO:0016874	ligase activity	Catalysis of the joining of two substances, or two groups within a single molecule, with the concomitant hydrolysis of the diphosphate bond in ATP or a similar triphosphate.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
	GO:0004638	phosphoribosylaminoimidazole carboxylase activity	Catalysis of the reaction: 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + 2 H(+) = 5-amino-1-(5-phospho-D-ribosyl)imidazole + CO(2).
	GO:0004639	phosphoribosylaminoimidazolesuccinocarboxamide synthase activity	Catalysis of the reaction: 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + L-aspartate + ATP = (2S)-2-[5-amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamido]succinate + ADP + 2 H(+) + phosphate.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
	GO:0006189	'de novo' IMP biosynthetic process	The chemical reactions and pathways resulting in the formation of IMP, inosine monophosphate, by the stepwise assembly of a purine ring on ribose 5-phosphate.
	GO:0046084	adenine biosynthetic process	The chemical reactions and pathways resulting in the formation of adenine, 6-aminopurine, one of the five main bases found in nucleic acids and a component of numerous important derivatives of its corresponding ribonucleoside, adenosine.
	GO:0006164	purine nucleotide biosynthetic process	The chemical reactions and pathways resulting in the formation of a purine nucleotide, a compound consisting of nucleoside (a purine base linked to a deoxyribose or ribose sugar) esterified with a phosphate group at either the 3' or 5'-hydroxyl group of the sugar.

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