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Protein

Probable sucrose-phosphate synthase 1

Gene

SPS1

Organism
Citrus unshiu (Satsuma mandarin) (Citrus nobilis var. unshiu)
Status
Reviewed-Annotation score: Annotation score: 2 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 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 1 (EC:2.4.1.14)
Alternative name(s):
UDP-glucose-fructose-phosphate glucosyltransferase 1
Gene namesi
Name:SPS1
OrganismiCitrus unshiu (Satsuma mandarin) (Citrus nobilis var. unshiu)
Taxonomic identifieri55188 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsSapindalesRutaceaeAurantioideaeCitrus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002046681 – 1057Probable sucrose-phosphate synthase 1Add BLAST1057

Interactioni

Subunit structurei

Homodimer or homotetramer.By similarity

Structurei

3D structure databases

ProteinModelPortaliO22060.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

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.

O22060-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAGNDWINSY LEAILDVGPG LDDAKSSLLL RERGRFSPTR YFVEEVITGF
60 70 80 90 100
DETDLHRSWV KAQATRSPQE RNTRLENMCW RIWNLARQKK QLEGEAAQRM
110 120 130 140 150
AKRRLERERG RREATADMSE DLSEGEKGDI VSDVSAHGDS TRSRLPRISS
160 170 180 190 200
VDAMETWISQ QKGKKLYIVL ISIHGLIRGE NMELGRDSDT GGQVKYVVEL
210 220 230 240 250
ARALGSMPGV YRVDLLTRQV SAPDVDWSYG EPTEMLTPRN SDDFMDDMGE
260 270 280 290 300
SSGAYIIRIP FGPKDKYIAK ELLWPHIPEF VDGALNHIIR MSNVLGEQIG
310 320 330 340 350
GGKPVWPVAI HGHYADAGDS AALLSGALNV PMLFTGHSLG RDKLEQLLKQ
360 370 380 390 400
ARLSRDEINA TYKIMRRIEA EELSLDASEI VITSTRQEIE EQWRLYDGFD
410 420 430 440 450
PVLERKLRAR IKRNVSCYGK FMPRMAIIPP GMEFHHIVPQ DGDMDGETEG
460 470 480 490 500
NEDNPASPDP PIWSEIMRFF TNPRKPVILA LARPDPKKNI TTLVKAFGEC
510 520 530 540 550
RPLRELANLT LIMGNRDGID EMSSTSASVL LSVLKLIDKY DLYGQVAYPK
560 570 580 590 600
HHKQSDVPEI YRLAAKTKGV FINPAFIEPF GLTLIEAAAH GLPIVATKNG
610 620 630 640 650
GPVDIHRVLD NGLLVDPHDQ QSIADALLKL VAGKQLWARC RQNGLKNIHL
660 670 680 690 700
FSWPEHCKTY LSRIAGCKPR HPQWQRTDDG GETSESDSPG DSLRDIQDIS
710 720 730 740 750
LNLKFSLDGE KSGASGNDDS LDSEGNVADR KSRLENAVLA WSKGVLKDTR
760 770 780 790 800
KSGSTDKVDQ NTGAAKFPAL RRRKHIFVIS VDCDSTTGLL DATKKICEAV
810 820 830 840 850
EKERTEGSIG FILSTSMTIS EIHSFLVSGH LSPSDFDAFI CNSGSDLYYS
860 870 880 890 900
TLNSEDGPFV VDFYYHSHIE YRWGGEGLRK TLVRWASQVT DKKAESGEKV
910 920 930 940 950
LTPAEQLSTN YCYAFSVQKP GMTPPVKELR KVLRIQALRC HVIYCQNGSR
960 970 980 990 1000
VNVIPVLASR SQALRYLYLR WGVELSKMVV FVGESGDTDY EGLLGGVHKT
1010 1020 1030 1040 1050
VILKGICSSS SNQIHANRSY PLSDVMPIDS PNIVQTPEDC TTSDIRSSLE

QLGLLKV
Length:1,057
Mass (Da):117,900
Last modified:January 1, 1998 - v1
Checksum:i447572147BDC16E9
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB005023 mRNA. Translation: BAA23213.1.
PIRiS72648.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB005023 mRNA. Translation: BAA23213.1.
PIRiS72648.

3D structure databases

ProteinModelPortaliO22060.
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...

Entry informationi

Entry nameiSPSA1_CITUN
AccessioniPrimary (citable) accession number: O22060
Entry historyi
Integrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: January 1, 1998
Last modified: April 13, 2016
This is version 66 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.