purC

phosphoribosylaminoimidazole succinocarboxamide synthase

locus: BSU_06450

pI: 4.88

mw: 27.31 kDa

protein length: 241 aa

gene length: 726 bp

function: purine biosynthesis

product: phosphoribosylaminoimidazole succinocarboxamide synthase

essential: no

ec: 6.3.2.6

synonyms

Genomic Context

categories

• [category|SW 2|Metabolism] → [category|SW 2.5|Nucleotide metabolism] → [category|SW 2.5.2|Biosynthesis/ acquisition of nucleotides] → [category|SW 2.5.2.1|Biosynthesis/ acquisition of purine nucleotides]

Gene

Coordinates: 701,601 702,326

The protein

Catalyzed reaction/ biological activity

• 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + ATP + L-aspartate --> (2S)-2-[5-amino-1-(5-phospho-β-D-ribosyl)imidazole-4-carboxamido]succinate + ADP + 2 H⁺ + phosphate (according to UniProt)

Protein family

• SAICAR synthetase family (according to Swiss-Prot)

Structure

• [PDB|1KUT] (from ''Thermotoga maritima'', 40% identity, 57% similarity) [Pubmed|16582479]

additional information

• belongs to the 100 [SW|most abundant proteins] [PubMed|15378759]

Expression and Regulation

Operons

• genes: [gene|1A9F7847AA1EB2A264842B44CD1B1A21F0AF6E57|purE]-[gene|0DA73E4D1935F6A91BE251EF2704A11DE5D81174|purK]-[gene|29FF54E2B9F4A11811F5E15885A4C02A259C7B35|purB]-[gene|447D12E940C7F45B6C5015844F9DED9D513CD6E5|purC]-[gene|CCD4DA969086181CFA33D6D241F2CAAE02E0C758|purS]-[gene|DEE856E83E790EB57F103F7A9156408AF090995D|purQ]-[gene|D34203FAA84C19B34B3CB5F00AC2E2663FFA344D|purL]-[gene|4AA5AF9C7CE8D0A9FD3A47650ECF130BCBEE1952|purF]-[gene|AD0DE9457D70DF02FA0F58867B24ABF236FAF65A|purM]-[gene|7B30F27D6C459437967A64467E52961F4A9E0F2C|purN]-[gene|54CE8EB2F5D1F9AEAA497E1F60248C9B2250B01E|purH]-[gene|9BBA22B09C6DD6C36E043D44B0F54BD0FFA5BA0E|purD]
  description: [Pubmed|3036807]

  sigma factors

  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, [Pubmed|3036807], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]

  regulatory mechanism

  • [regulon|G-box|G-box]: termination, ([SW|riboswitch]) [pubmed|3036807,12787499], in [regulon|G-box|G-box]
  • [protein|A8C82F5825DE0921DA6B4ACDE0CC31EC7749273C|PurR]: repression, (molecular inducer: PRPP) [Pubmed|7638212,2536750], in [regulon|A8C82F5825DE0921DA6B4ACDE0CC31EC7749273C|PurR regulon]

  regulation

  • expression activated by glucose (4.4 fold) [Pubmed|12850135]

additional information

• the mRNA is very stable (> 15 min) [pubmed|12884008]

Biological materials

Mutant

• BKE06450 ([gene|447D12E940C7F45B6C5015844F9DED9D513CD6E5|purC]::erm trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKE06450 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CACGGAAGGCCTCCTAACCC, downstream forward: _UP4_TTCAATAGACTGGGAGGCAT
• BKK06450 ([gene|447D12E940C7F45B6C5015844F9DED9D513CD6E5|purC]::kan trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKK06450 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CACGGAAGGCCTCCTAACCC, downstream forward: _UP4_TTCAATAGACTGGGAGGCAT

References

• 12884008,3036807,12923093,7638212,15378759