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Protein

Glutamine synthetase

Gene

glnA

Organism
Staphylococcus aureus (strain Mu50 / ATCC 700699)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Glutamine synthetase (GS) is an unusual multitasking protein that functions as an enzyme, a transcription coregulator, and a chaperone in ammonium assimilationn and in the regulation of genes involved in nitrogen metabolism. It catalyzes the ATP-dependent biosynthesis of glutamine from glutamate and ammonia. Feedback-inhibited GlnA also interacts with and regulates the activity of the transcriptional regulator TnrA. During nitrogen limitation, TnrA is in its DNA-binding active state and turns on the transcription of genes required for nitrogen assimilation. Under conditions of nitrogen excess, feedback-inhibited GlnA forms a stable complex with TnrA, which inhibits its DNA-binding activity. In contrast, feedback-inhibited GlnA acts as a chaperone to stabilize the DNA-binding activity of GlnR, which represses the transcription of nitrogen assimilation genes.By similarity

Catalytic activityi

ATP + L-glutamate + NH3 = ADP + phosphate + L-glutamine.By similarity

Enzyme regulationi

Inhibited by glutamine.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei64Important for inhibition by glutamineBy similarity1
Metal bindingi134Magnesium 1By similarity1
Binding sitei134ATPBy similarity1
Metal bindingi136Magnesium 2By similarity1
Binding sitei158ATPBy similarity1
Metal bindingi191Magnesium 2By similarity1
Metal bindingi198Magnesium 2By similarity1
Binding sitei243L-glutamate; via oxygen carbonylBy similarity1
Metal bindingi247Magnesium 1; via pros nitrogenBy similarity1
Binding sitei300L-glutamateBy similarity1
Binding sitei306L-glutamateBy similarity1
Metal bindingi335Magnesium 1By similarity1
Binding sitei337L-glutamateBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionLigase
LigandATP-binding, Magnesium, Metal-binding, Nucleotide-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Glutamine synthetaseBy similarity (EC:6.3.1.2By similarity)
Short name:
GSBy similarity
Alternative name(s):
Glutamate--ammonia ligaseBy similarity
Glutamine synthetase I alphaBy similarity
Short name:
GSI alphaBy similarity
Gene namesi
Name:glnABy similarity
Ordered Locus Names:SAV1310
OrganismiStaphylococcus aureus (strain Mu50 / ATCC 700699)
Taxonomic identifieri158878 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliBacillalesStaphylococcaceaeStaphylococcus
Proteomesi
  • UP000002481 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm By similarity

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001532581 – 446Glutamine synthetaseAdd BLAST446

Proteomic databases

PaxDbiP60890.
PRIDEiP60890.

2D gel databases

World-2DPAGE0002:P60890.

Interactioni

Subunit structurei

Oligomer of 12 subunits arranged in the form of two hexagons. In its feedback-inhibited form, interacts with TnrA in order to block its DNA-binding activity.By similarity

Protein-protein interaction databases

STRINGi158878.SAV1310.

Structurei

3D structure databases

ProteinModelPortaliP60890.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the glutamine synthetase family.Curated

Phylogenomic databases

eggNOGiENOG4105C5F. Bacteria.
COG0174. LUCA.
HOGENOMiHOG000005156.
KOiK01915.
OMAiNIMTFRH.
PhylomeDBiP60890.

Family and domain databases

Gene3Di3.10.20.70. 1 hit.
3.30.590.10. 1 hit.
InterProiView protein in InterPro
IPR008147. Gln_synt_b-grasp.
IPR014746. Gln_synth/guanido_kin_cat_dom.
IPR008146. Gln_synth_cat_dom.
IPR027303. Gln_synth_gly_rich_site.
IPR004809. Gln_synth_I.
IPR027302. Gln_synth_N_conserv_site.
PfamiView protein in Pfam
PF00120. Gln-synt_C. 1 hit.
PF03951. Gln-synt_N. 1 hit.
SMARTiView protein in SMART
SM01230. Gln-synt_C. 1 hit.
SUPFAMiSSF54368. SSF54368. 1 hit.
TIGRFAMsiTIGR00653. GlnA. 1 hit.
PROSITEiView protein in PROSITE
PS00180. GLNA_1. 1 hit.
PS00181. GLNA_ATP. 1 hit.

Sequencei

Sequence statusi: Complete.

P60890-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MPKRTFTKED IRKFAEEENV RYLRLQFTDI LGTIKNVEVP VSQLEKVLDN
60 70 80 90 100
EMMFDGSSIE GFVRIEESDM YLHPDLDTWV IFPWTAGQGK VARLICDVYK
110 120 130 140 150
TDGTPFEGDP RANLKRVLKE MEDLGFTDFN LGPEPEFFLF KLDEKGEPTL
160 170 180 190 200
ELNDDGGYFD LAPTDLGENC RRDIVLELED MGFDIEASHH EVAPGQHEID
210 220 230 240 250
FKYADAVTAC DNIQTFKLVV KTIARKHNLH ATFMPKPLFG VNGSGMHFNV
260 270 280 290 300
SLFKGKENAF FDPNTEMGLT ETAYQFTAGV LKNARGFTAV CNPLVNSYKR
310 320 330 340 350
LVPGYEAPCY IAWSGKNRSP LIRVPSSRGL STRIEVRSVD PAANPYMALA
360 370 380 390 400
AILEAGLDGI KNKLKVPEPV NQNIYEMNRE EREAVGIQDL PSTLYTALKA
410 420 430 440
MRENEVIKKA LGNHIYNQFI NSKSIEWDYY RTQVSEWERD QYMKQY
Length:446
Mass (Da):50,855
Last modified:April 13, 2004 - v1
Checksum:iFF9F25631167903D
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000017 Genomic DNA. Translation: BAB57472.1.
RefSeqiWP_001126606.1. NC_002758.2.

Genome annotation databases

EnsemblBacteriaiBAB57472; BAB57472; SAV1310.
KEGGisav:SAV1310.
PATRICi19563331. VBIStaAur52173_1343.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000017 Genomic DNA. Translation: BAB57472.1.
RefSeqiWP_001126606.1. NC_002758.2.

3D structure databases

ProteinModelPortaliP60890.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi158878.SAV1310.

2D gel databases

World-2DPAGE0002:P60890.

Proteomic databases

PaxDbiP60890.
PRIDEiP60890.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAB57472; BAB57472; SAV1310.
KEGGisav:SAV1310.
PATRICi19563331. VBIStaAur52173_1343.

Phylogenomic databases

eggNOGiENOG4105C5F. Bacteria.
COG0174. LUCA.
HOGENOMiHOG000005156.
KOiK01915.
OMAiNIMTFRH.
PhylomeDBiP60890.

Family and domain databases

Gene3Di3.10.20.70. 1 hit.
3.30.590.10. 1 hit.
InterProiView protein in InterPro
IPR008147. Gln_synt_b-grasp.
IPR014746. Gln_synth/guanido_kin_cat_dom.
IPR008146. Gln_synth_cat_dom.
IPR027303. Gln_synth_gly_rich_site.
IPR004809. Gln_synth_I.
IPR027302. Gln_synth_N_conserv_site.
PfamiView protein in Pfam
PF00120. Gln-synt_C. 1 hit.
PF03951. Gln-synt_N. 1 hit.
SMARTiView protein in SMART
SM01230. Gln-synt_C. 1 hit.
SUPFAMiSSF54368. SSF54368. 1 hit.
TIGRFAMsiTIGR00653. GlnA. 1 hit.
PROSITEiView protein in PROSITE
PS00180. GLNA_1. 1 hit.
PS00181. GLNA_ATP. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiGLNA_STAAM
AccessioniPrimary (citable) accession number: P60890
Secondary accession number(s): Q99UG5
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 13, 2004
Last sequence update: April 13, 2004
Last modified: February 15, 2017
This is version 85 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.