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Protein

Phosphocarrier protein HPr

Gene

ptsH

Organism
Lactococcus lactis subsp. cremoris (Streptococcus cremoris)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the PTS EIIA domain.By similarity
P-Ser-HPr interacts with the catabolite control protein A (CcpA), forming a complex that binds to DNA at the catabolite response elements cre, operator sites preceding a large number of catabolite-regulated genes. Thus, P-Ser-HPr is a corepressor in carbon catabolite repression (CCR), a mechanism that allows bacteria to coordinate and optimize the utilization of available carbon sources. P-Ser-HPr also plays a role in inducer exclusion, in which it probably interacts with several non-PTS permeases and inhibits their transport activity (By similarity).By similarity

Enzyme regulationi

Phosphorylation on Ser-46 inhibits the phosphoryl transfer from enzyme I to HPr.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei15Pros-phosphohistidine intermediatePROSITE-ProRule annotation1

GO - Biological processi

Keywordsi

Biological processPhosphotransferase system, Sugar transport, Transcription, Transcription regulation, Transport

Names & Taxonomyi

Protein namesi
Recommended name:
Phosphocarrier protein HPr
Alternative name(s):
Histidine-containing protein
Gene namesi
Name:ptsH
OrganismiLactococcus lactis subsp. cremoris (Streptococcus cremoris)
Taxonomic identifieri1359 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeLactococcus

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001078581 – 88Phosphocarrier protein HPrAdd BLAST88

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei46Phosphoserine; by HPrK/PPROSITE-ProRule annotation1

Keywords - PTMi

Phosphoprotein

Structurei

3D structure databases

ProteinModelPortaliQ9ZAD9
SMRiQ9ZAD9
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini1 – 88HPrPROSITE-ProRule annotationAdd BLAST88

Sequence similaritiesi

Belongs to the HPr family.Curated

Phylogenomic databases

eggNOGiENOG4105KRI Bacteria
COG1925 LUCA

Family and domain databases

CDDicd00367 PTS-HPr_like, 1 hit
Gene3Di3.30.1340.10, 1 hit
InterProiView protein in InterPro
IPR000032 HPr-like
IPR035895 HPr-like_sf
IPR001020 PTS_HPr_His_P_site
IPR002114 PTS_HPr_Ser_P_site
PfamiView protein in Pfam
PF00381 PTS-HPr, 1 hit
PRINTSiPR00107 PHOSPHOCPHPR
SUPFAMiSSF55594 SSF55594, 1 hit
TIGRFAMsiTIGR01003 PTS_HPr_family, 1 hit
PROSITEiView protein in PROSITE
PS51350 PTS_HPR_DOM, 1 hit
PS00369 PTS_HPR_HIS, 1 hit
PS00589 PTS_HPR_SER, 1 hit

Sequencei

Sequence statusi: Complete.

Q9ZAD9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASKEFHIVA ETGIHARPAT LLVQTASKFT SEITLEYKGK SVNLKSIMGV
60 70 80
MSLGVGQGAD VTISAEGADA DDAIATIAET MTKEGLAE
Length:88
Mass (Da):9,126
Last modified:May 1, 1999 - v1
Checksum:iDC37DE075BFD8BC5
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Z97203 Genomic DNA Translation: CAB10076.1
RefSeqiWP_011834224.1, NZ_MUHT01000005.1

Similar proteinsi

Entry informationi

Entry nameiPTHP_LACLC
AccessioniPrimary (citable) accession number: Q9ZAD9
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 27, 2001
Last sequence update: May 1, 1999
Last modified: January 31, 2018
This is version 96 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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