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Protein

Probable sucrose-phosphate synthase 2

Gene

SPS2

Organism
Craterostigma plantagineum (Blue gem) (Torenia plantagineum)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at transcript leveli

Functioni

Plays a role in photosynthetic sucrose synthesis by catalyzing the rate-limiting step of sucrose biosynthesis from UDP-glucose and fructose- 6-phosphate. Involved in the regulation of carbon partitioning in the leaves of plants. May regulate the synthesis of sucrose and therefore play a major role as a limiting factor in the export of photoassimilates out of the leaf. Plays a role for sucrose availability that is essential for plant growth and fiber elongation (By similarity).By similarity

Catalytic activityi

UDP-glucose + D-fructose 6-phosphate = UDP + sucrose 6(F)-phosphate.

Enzyme regulationi

Activity is regulated by phosphorylation and moderated by concentration of metabolites and light.By similarity

Pathwayi: sucrose biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes sucrose from D-fructose 6-phosphate and UDP-alpha-D-glucose.
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. Probable sucrose-phosphate synthase 2 (SPS2), Probable sucrose-phosphate synthase 1 (SPS1)
  2. no protein annotated in this organism
This subpathway is part of the pathway sucrose biosynthesis, which is itself part of Glycan biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes sucrose from D-fructose 6-phosphate and UDP-alpha-D-glucose, the pathway sucrose biosynthesis and in Glycan biosynthesis.

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Glycosyltransferase, Transferase

Enzyme and pathway databases

UniPathwayiUPA00371; UER00545.

Protein family/group databases

CAZyiGT4. Glycosyltransferase Family 4.

Names & Taxonomyi

Protein namesi
Recommended name:
Probable sucrose-phosphate synthase 2 (EC:2.4.1.14)
Alternative name(s):
UDP-glucose-fructose-phosphate glucosyltransferase 2
Gene namesi
Name:SPS2
OrganismiCraterostigma plantagineum (Blue gem) (Torenia plantagineum)
Taxonomic identifieri4153 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaeasteridslamiidsLamialesLinderniaceaeCraterostigma

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 10811081Probable sucrose-phosphate synthase 2PRO_0000204670Add
BLAST

Interactioni

Subunit structurei

Homodimer or homotetramer.By similarity

Structurei

3D structure databases

ProteinModelPortaliO04933.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Compositional bias

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Compositional biasi245 – 2484Poly-Ser
Compositional biasi256 – 2649Poly-Glu
Compositional biasi787 – 7904Poly-Arg

Sequence similaritiesi

Belongs to the glycosyltransferase 1 family.Curated

Family and domain databases

InterProiIPR001296. Glyco_trans_1.
IPR006380. SPP_N.
IPR000368. Sucrose_synth.
IPR012819. SucrsPsyn_pln.
[Graphical view]
PfamiPF00534. Glycos_transf_1. 1 hit.
PF05116. S6PP. 1 hit.
PF00862. Sucrose_synth. 1 hit.
[Graphical view]
TIGRFAMsiTIGR02468. sucrsPsyn_pln. 1 hit.

Sequencei

Sequence statusi: Complete.

O04933-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAGNEWINGY LEAILDTGAS AIDENSGGGK TAAAQKGRHH DHHFNPTKYF
60 70 80 90 100
VEEVVSGVDE SDLHRTWIKV VATRNTRERS SRLENMCWRI WHLTRKKKQL
110 120 130 140 150
EWEDLQRLAA RKWEREQGRK DVTEDMSEDL SEGEKGDVMG ETPVALDSPR
160 170 180 190 200
GNKKYHRNFS NLEVWSDSNK EKKLYIVLIS LHGLVRGENM ELGRDSDTGG
210 220 230 240 250
QIKYVVEVAR ALAKMPGVYR VDLFTRQISS PEVDWSYAEP TEMLSSSSTT
260 270 280 290 300
AGEAHEPEEE EEEEDLGEGS GAYIIRIPFG PRDKYLRKEL LWPHIQEFVD
310 320 330 340 350
GALSHIVNMS KALGDQIGGG QPVWPYVIHG HYADAGDSAA LLSGALNVPM
360 370 380 390 400
VLTGHSLGRN KLEQLLKQGR QTKEDINSMY RIMRRIEAEE LSLDAAELVI
410 420 430 440 450
TSTKQEIEEQ WGLYDGFDVK LERVLRARAR RGVNCHGRFM PRMAVIPPGM
460 470 480 490 500
DFSNVVVPED GSEGDGDLAT LTEATSPRSV PAIWADVMRF LTNPHKPMIL
510 520 530 540 550
ALSRPDPKKN ITTLVKAFGE CRPLRELANL TLIMGNRDDI DEMSGGNASV
560 570 580 590 600
LTTVLKLIDR YDLYGQVAFP KHHKQSDVPE IYRLASKTKG VFINPAFIEP
610 620 630 640 650
FGLTLIEAAA HGLPMVATKN GGPVDIHRAL NNGLLVDPHD QDAIANALLK
660 670 680 690 700
LVSEKNLWNE CRKNGLKNIH LFSWPEHCRT YLTRVAACRM RHPQWKTDTP
710 720 730 740 750
LDETAIDDSL NDSLKDVLDM SLRLSVDGEK MSVNESSSVE LPGGEAAELP
760 770 780 790 800
DQVRRVLNKI KRQDSGPAQR EAEGKAGDVP GKYPMLRRRR KLFVIALDCY
810 820 830 840 850
DLKGNPDKKM ILSIQEIVRA VRLDPQMSRF SGFALSTAMP VAELADFLKA
860 870 880 890 900
GDVKVNDFDA LICSSGSEVY YPGTYGEESG KLYLDPDYTS HIEYRWGGDG
910 920 930 940 950
LKKTISKLMN TAEDGKSSVA SSPIELVAKS SNSHCLSYAI KDPSKAKKVD
960 970 980 990 1000
DMRQKLRMRG LRCHLMYCRN STSMQVVPLL ASRSQALRYL FVRWRLSVAN
1010 1020 1030 1040 1050
MYVILGETGD TDYEELISGT HKTLIMRGVV EKGSEELLRT AGSYLRDDVI
1060 1070 1080
PQDTPLIAYA DKGAKAEHIV ETFRQLSKAG M
Length:1,081
Mass (Da):120,934
Last modified:July 1, 1997 - v1
Checksum:iDD142DC2F1A72900
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y11795 mRNA. Translation: CAA72491.1.
PIRiT09837.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y11795 mRNA. Translation: CAA72491.1.
PIRiT09837.

3D structure databases

ProteinModelPortaliO04933.
ModBaseiSearch...
MobiDBiSearch...

Protein family/group databases

CAZyiGT4. Glycosyltransferase Family 4.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayiUPA00371; UER00545.

Family and domain databases

InterProiIPR001296. Glyco_trans_1.
IPR006380. SPP_N.
IPR000368. Sucrose_synth.
IPR012819. SucrsPsyn_pln.
[Graphical view]
PfamiPF00534. Glycos_transf_1. 1 hit.
PF05116. S6PP. 1 hit.
PF00862. Sucrose_synth. 1 hit.
[Graphical view]
TIGRFAMsiTIGR02468. sucrsPsyn_pln. 1 hit.
ProtoNetiSearch...

Publicationsi

  1. "Analysis of cDNA clones encoding sucrose-phosphate synthase in relation to sugar interconversions associated with dehydration in the resurrection plant Craterostigma plantagineum Hochst."
    Ingram J., Chandler J.W., Gallagher L., Salamini F., Bartels D.
    Plant Physiol. 115:113-121(1997) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA].

Entry informationi

Entry nameiSPSA2_CRAPL
AccessioniPrimary (citable) accession number: O04933
Entry historyi
Integrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: July 1, 1997
Last modified: April 13, 2016
This is version 69 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. 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.