1B6S - JenaLib

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Biological Unit 2 (Jmol Viewer)

Title :   STRUCTURE OF N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE

Authors :   J. B. Thoden, T. J. Kappock, J. Stubbe, H. M. Holden

Date :   18 Jan 99 (Deposition) - 30 Nov 99 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.50

Chains :   Asym. Unit : A,B,C,D
Biol. Unit 1: A,B  (1x)
Biol. Unit 2: C,D  (1x)

Keywords :   Atp-Grasp, Carboxyphosphate, Purine Biosynthesis, Lyase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   J. B. Thoden, T. J. Kappock, J. Stubbe, H. M. Holden
Three-Dimensional Structure Of N5-Carboxyaminoimidazole Ribonucleotide Synthetase: A Member Of The Atp Grasp Protein Superfamily.
Biochemistry V. 38 15480 1999
PubMed-ID: 10569930 | Reference-DOI: 10.1021/BI991618S
(for further references see the PDB file header)

Molecule 1 - PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE)
	Chains	:	A, B, C, D
	EC Number	:	4.1.1.21
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562
	Synonym	:	AIRC, PURK

		1	2	3	4
Asymmetric Unit	:	A	B	C	D
Biological Unit 1 (1x)	:	A	B
Biological Unit 2 (1x)	:			C	D

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 8)

No.	Name	Count	Type	Full Name
1	ADP	4	Ligand/Ion	ADENOSINE-5'-DIPHOSPHATE
2	MG	4	Ligand/Ion	MAGNESIUM ION

Biological Unit 1 (1, 2)

No.	Name	Count	Type	Full Name
1	ADP	2	Ligand/Ion	ADENOSINE-5'-DIPHOSPHATE
2	MG	-1	Ligand/Ion	MAGNESIUM ION

Biological Unit 2 (1, 2)

No.	Name	Count	Type	Full Name
1	ADP	2	Ligand/Ion	ADENOSINE-5'-DIPHOSPHATE
2	MG	-1	Ligand/Ion	MAGNESIUM ION

Asymmetric Unit (8, 8)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	HIS A:184 , GLU A:226 , GLU A:238 , ADP A:1100	BINDING SITE FOR RESIDUE MG A 1101
2	AC2	SOFTWARE	GLU B:226 , GLU B:238 , ADP B:1200	BINDING SITE FOR RESIDUE MG B 1201
3	AC3	SOFTWARE	GLU C:226 , GLU C:238 , ADP C:1300	BINDING SITE FOR RESIDUE MG C 1301
4	AC4	SOFTWARE	GLU D:226 , GLU D:238 , ADP D:1400	BINDING SITE FOR RESIDUE MG D 1401
5	AC5	SOFTWARE	ARG A:80 , LYS A:120 , GLN A:131 , GLU A:153 , GLN A:154 , ILE A:156 , PHE A:158 , GLU A:161 , HIS A:184 , PHE A:228 , ASN A:237 , GLU A:238 , MG A:1101	BINDING SITE FOR RESIDUE ADP A 1100
6	AC6	SOFTWARE	ARG B:80 , ILE B:118 , LYS B:120 , GLY B:125 , TYR B:126 , ASP B:127 , GLY B:128 , GLN B:131 , ARG B:133 , GLU B:153 , GLN B:154 , ILE B:156 , PHE B:158 , GLU B:161 , HIS B:184 , PHE B:228 , ASN B:237 , GLU B:238 , MG B:1201	BINDING SITE FOR RESIDUE ADP B 1200
7	AC7	SOFTWARE	ARG C:80 , ILE C:118 , LYS C:120 , GLN C:131 , GLU C:153 , GLN C:154 , ILE C:156 , PHE C:158 , GLU C:161 , HIS C:184 , PHE C:228 , ASN C:237 , GLU C:238 , MG C:1301 , HOH C:2471	BINDING SITE FOR RESIDUE ADP C 1300
8	AC8	SOFTWARE	ARG D:80 , LYS D:120 , GLN D:131 , ARG D:133 , GLU D:153 , GLN D:154 , ILE D:156 , PHE D:158 , GLU D:161 , HIS D:184 , PHE D:228 , ASN D:237 , GLU D:238 , MG D:1401	BINDING SITE FOR RESIDUE ADP D 1400

Asymmetric Unit

No.	Residues
1	A:146	-	A:150
2	B:146	-	B:150
3	C:146	-	C:150
4	D:146	-	D:150

(no "Cis Peptide Bond" information available for 1B6S)

(no "SAP(SNP)/Variant" information available for 1B6S)

(no "PROSITE Motif" information available for 1B6S)

(no "Exon" information available for 1B6S)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
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	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:351
 aligned with PURK_ECOLI | P09029 from UniProtKB/Swiss-Prot  Length:355

    Alignment length:355
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
           PURK_ECOLI     1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGGYDGRGQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQAQAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
               SCOP domains d1b6sa2 A:1-78                                                                d1b6sa3 A:79-276 N5-carboxyaminoimidazole ribon    ucleotide synthetase PurK (AIRC), domain 2                                                                                                         d1b6sa1 A:277-355                                                               SCOP domains
               CATH domains 1b6sA01 A:1-70  [code=3.40.50.20, no name defined]                    1b6sA02                1b6sA03 A:94-155 ATP-grasp fold,     A domain                 1b6sA02 A:71-93,A:156-354 ATP-grasp fold, B domain                                                                                                                                                     - CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeee...hhhhhhhhhhhhh.eeeeee.....hhh..hhh.eeee........hhhhhhhh.........hhhhh.hhhhhhhhhhh......eee...hhhhhhhhhh...eeeeee....----.eeeee...hhh........eeeee.....eeeeeeeee.....eee...eeeeee..eeeeeee.....hhhhhhhhhhhhhhhhhh...eeeeeeeee.....eeeeee....hhhhhhhhh....hhhhhhhhh.............eeeeeee.....hhhhh...eeeee.........eeeeeeee...hhhhhhhhhhhhhh..hhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1b6s A   1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGG----GQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQARAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
                                    10        20        30        40        50        60        70        80        90       100       110       120    |  130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
                                                                                                                                                      125  130

Chain B from PDB  Type:PROTEIN  Length:355
 aligned with PURK_ECOLI | P09029 from UniProtKB/Swiss-Prot  Length:355

    Alignment length:355
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
           PURK_ECOLI     1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGGYDGRGQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQAQAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
               SCOP domains d1b6sb2 B:1-78                                                                d1b6sb3 B:79-276 N5-carboxyaminoimidazole ribonucleotide synthetase PurK (AIRC), domain 2                                                                                                             d1b6sb1 B:277-355                                                               SCOP domains
               CATH domains 1b6sB01 B:1-70  [code=3.40.50.20, no name defined]                    1b6sB02                1b6sB03 B:94-155 ATP-grasp fold, A domain                     1b6sB02 B:71-93,B:156-354 ATP-grasp fold, B domain                                                                                                                                                     - CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeee...hhhhhhhhhhhhh.eeeeee.....hhh.hhhh.eeee........hhhhhhhh......hhhhhhhh.hhhhhhhhhh.......eeee..hhhhhhhhhhh...eeeee.........eeee....hhh..hhh...eeeee.....eeeeeeeee.....eee...eeeeee..eeeeeee.....hhhhhhhhhhhhhhhhhh...eeeeeeeee....eeeeeee....hhhhhhhhh....hhhhhhhhh............eeeeeeee.....hhhhh...eeeee.........eeeeeeeee..hhhhhhhhhhhhhh..hhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1b6s B   1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGGYDGRGQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQARAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350

Chain C from PDB  Type:PROTEIN  Length:350
 aligned with PURK_ECOLI | P09029 from UniProtKB/Swiss-Prot  Length:355

    Alignment length:355
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
           PURK_ECOLI     1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGGYDGRGQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQAQAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
               SCOP domains d1b6sc2 C:1-78                                                                d1b6sc3 C:79-276 N5-carboxyaminoimidazole ribo     nucleotide synthetase PurK (AIRC), domain 2                                                                                                        d1b6sc1 C:277-355                                                               SCOP domains
               CATH domains 1b6sC01 C:1-70  [code=3.40.50.20, no name defined]                    1b6sC02                1b6sC03 C:94-155 ATP-grasp fold     , A domain                1b6sC02 C:71-93,C:156-354 ATP-grasp fold, B domain                                                                                                                                                     - CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeee...hhhhhhhhhhhhh.eeeeee..........hhh.eeee........hhhhhhhh......hhhhhhhh.hhhhhhhhhh.......eee...hhhhhhhhhh....eeeee...-----.eeee...............eeeee.....eeeeeeeee.....eee...eeeeee..eeeeeee.....hhhhhhhhhhhhhhhhhh...eeeeeeeee....eeeeeee....hhhhhhhhh....hhhhhhhhh............eeeeeeee.....hhhhh...eeeee.........eeeeeeeee..hhhhhhhhhhhhhh..hhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1b6s C   1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTG-----GQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQARAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
                                    10        20        30        40        50        60        70        80        90       100       110       120   |   130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
                                                                                                                                                     124   130

Chain D from PDB  Type:PROTEIN  Length:350
 aligned with PURK_ECOLI | P09029 from UniProtKB/Swiss-Prot  Length:355

    Alignment length:355
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
           PURK_ECOLI     1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTGGYDGRGQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQAQAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
               SCOP domains d1b6sd2 D:1-78                                                                d1b6sd3 D:79-276 N5-carboxyaminoimidazole ribo     nucleotide synthetase PurK (AIRC), domain 2                                                                                                        d1b6sd1 D:277-355                                                               SCOP domains
               CATH domains 1b6sD01 D:1-70  [code=3.40.50.20, no name defined]                    1b6sD02                1b6sD03 D:94-155 ATP-grasp fold     , A domain                1b6sD02 D:71-93,D:156-354 ATP-grasp fold, B domain                                                                                                                                                     - CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeee...hhhhhhhhhhhhh.eeeeee.....hhh.hhhh.eeee........hhhhhhhh......hhhhhhhh.hhhhhhhhhhh......eeee..hhhhhhhhhhh..eeeeee...-----.eeeee...hhh..hhh...eeeee.....eeeeeeeee.....eee...eeeeee..eeeeeee.....hhhhhhhhhhhhhhhhh....eeeeeeeeee..eeeeeeee....hhhhhhhhh....hhhhhhhhh............eeeeeeee.....hhhhh...eeeee.........eeeeeeeee..hhhhhhhhhhhhhh..hhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1b6s D   1 MKQVCVLGNGQLGRMLRQAGEPLGIAVWPVGLDAEPAAVPFQQSVITAEIERWPETALTRELARHPAFVNRDVFPIIADRLTQKQLFDKLHLPTAPWQLLAERSEWPAVFDRLGELAIVKRRTG-----GQWRLRANETEQLPAECYGECIVEQGINFSGEVSLVGARGFDGSTVFYPLTHNLHQDGILRTSVAFPQANAQQQARAEEMLSAIMQELGYVGVMAMECFVTPQGLLINELAPRVHNSGHWTQNGASISQFELHLRAITDLPLPQPVVNNPSVMINLIGSDVNYDWLKLPLVHLHWYDKEVRPGRKVGHLNLTDSDTSRLTATLEALIPLLPPEYASGVIWAQSKFG 355
                                    10        20        30        40        50        60        70        80        90       100       110       120   |   130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350     
                                                                                                                                                     124   130

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 '\|'

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: 2-Layer Sandwich (8480)

Topology: D-amino Acid Aminotransferase; Chain A, domain 1 (175)

Homologous Superfamily: ATP-grasp fold, B domain (118)

Escherichia coli. Organism_taxid: 562 (5)

1a	1b6sA02	A:71-93,A:156-354
1b	1b6sB02	B:71-93,B:156-354
1c	1b6sC02	C:71-93,C:156-354
1d	1b6sD02	D:71-93,D:156-354

Topology: Dna Ligase; domain 1 (375)

Homologous Superfamily: ATP-grasp fold, A domain (109)

Escherichia coli. Organism_taxid: 562 (5)

2a	1b6sB03	B:94-155
2b	1b6sA03	A:94-155
2c	1b6sC03	C:94-155
2d	1b6sD03	D:94-155

Architecture: 3-Layer(aba) Sandwich (12045)

Topology: Rossmann fold (7312)

Homologous Superfamily: [code=3.40.50.20, no name defined] (85)

Escherichia coli. Organism_taxid: 562 (5)

3a	1b6sA01	A:1-70
3b	1b6sB01	B:1-70
3c	1b6sC01	C:1-70
3d	1b6sD01	D:1-70

(no "Pfam Domain" information available for 1B6S)

Asymmetric Unit(hide GO term definitions)

Chain A,B,C,D (PURK_ECOLI | P09029)

molecular function
	GO:0034028	5-(carboxyamino)imidazole ribonucleotide synthase activity	Catalysis of the reaction: 5-amino-1-(5-phospho-D-ribosyl)imidazole + ATP + bicarbonate = 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole + ADP + 3 H(+) + phosphate.
	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:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	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.
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.
cellular component
	GO:0005829	cytosol	The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

Asymmetric Unit
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	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 1b6s)

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	1b6s
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		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)

UniProtKB/Swiss-Prot
	PURK_ECOLI \| P09029	:	1b6r 3eth 3etj

(no "Related Entries Specified in the PDB File" available for 1B6S)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (2, 8)

Sites (8, 8)

SS Bonds (4, 4)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (3, 12)

CATH Domains (3, 12)

Pfam Domains (0, 0)

Gene Ontology (11, 11)

Visualization

Interactive Views

Still Images

Databases and Analysis Tools

Databases

Analysis Tools

Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File