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Protein

Sucrose-phosphate synthase

Gene

SPS

Organism
Zea mays (Maize)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein 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.1 Publication

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. Sucrose-phosphate synthase (SPS)
  2. Sucrose-phosphatase 2 (SPP2), Sucrose-phosphatase 1 (SPP1)
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:
Sucrose-phosphate synthase (EC:2.4.1.14)
Alternative name(s):
UDP-glucose-fructose-phosphate glucosyltransferase
Gene namesi
Name:SPS
OrganismiZea mays (Maize)
Taxonomic identifieri4577 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaePACMAD cladePanicoideaeAndropogonodaeAndropogoneaeTripsacinaeZea
Proteomesi
  • UP000007305 Componenti: Chromosome 8

Organism-specific databases

MaizeGDBi25294.

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 10681068Sucrose-phosphate synthasePRO_0000204671Add
BLAST

Proteomic databases

PaxDbiP31927.
PRIDEiP31927.

Expressioni

Developmental stagei

Germinating seeds or mature leaves.

Gene expression databases

ExpressionAtlasiP31927. baseline and differential.
GenevisibleiP31927. ZM.

Interactioni

Subunit structurei

Homodimer or homotetramer.

Protein-protein interaction databases

STRINGi4577.GRMZM5G875238_P01.

Structurei

3D structure databases

ProteinModelPortaliP31927.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Compositional bias

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Compositional biasi25 – 317Poly-Gly

Sequence similaritiesi

Belongs to the glycosyltransferase 1 family.Curated

Phylogenomic databases

eggNOGiKOG0853. Eukaryota.
COG0438. LUCA.
HOGENOMiHOG000009685.
KOiK00696.
OMAiEMSAGNA.
OrthoDBiEOG093600RM.

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.

P31927-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAGNEWINGY LEAILDSHTS SRGAGGGGGG GDPRSPTKAA SPRGAHMNFN
60 70 80 90 100
PSHYFVEEVV KGVDESDLHR TWIKVVATRN ARERSTRLEN MCWRIWHLAR
110 120 130 140 150
KKKQLELEGI QRISARRKEQ EQVRREATED LAEDLSEGEK GDTIGELAPV
160 170 180 190 200
ETTKKKFQRN FSDLTVWSDD NKEKKLYIVL ISVHGLVRGE NMELGRDSDT
210 220 230 240 250
GGQVKYVVEL ARAMSMMPGV YRVDLFTRQV SSPDVDWSYG EPTEMLCAGS
260 270 280 290 300
NDGEGMGESG GAYIVRIPCG PRDKYLKKEA LWPYLQEFVD GALAHILNMS
310 320 330 340 350
KALGEQVGNG RPVLPYVIHG HYADAGDVAA LLSGALNVPM VLTGHSLGRN
360 370 380 390 400
KLEQLLKQGR MSKEEIDSTY KIMRRIEGEE LALDASELVI TSTRQEIDEQ
410 420 430 440 450
WGLYDGFDVK LEKVLRARAR RGVSCHGRYM PRMVVIPPGM DFSNVVVHED
460 470 480 490 500
IDGDGDVKDD IVGLEGASPK SMPPIWAEVM RFLTNPHKPM ILALSRPDPK
510 520 530 540 550
KNITTLVKAF GECRPLRELA NLTLIMGNRD DIDDMSAGNA SVLTTVLKLI
560 570 580 590 600
DKYDLYGSVA FPKHHNQADV PEIYRLAAKM KGVFINPALV EPFGLTLIEA
610 620 630 640 650
AAHGLPIVAT KNGGPVDITN ALNNGLLVDP HDQNAIADAL LKLVADKNLW
660 670 680 690 700
QECRRNGLRN IHLYSWPEHC RTYLTRVAGC RLRNPRWLKD TPADAGADEE
710 720 730 740 750
EFLEDSMDAQ DLSLRLSIDG EKSSLNTNDP LWFDPQDQVQ KIMNNIKQSS
760 770 780 790 800
ALPPSMSSVA AEGTGSTMNK YPLLRRRRRL FVIAVDCYQD DGRASKKMLQ
810 820 830 840 850
VIQEVFRAVR SDSQMFKISG FTLSTAMPLS ETLQLLQLGK IPATDFDALI
860 870 880 890 900
CGSGSEVYYP GTANCMDAEG KLRPDQDYLM HISHRWSHDG ARQTIAKLMG
910 920 930 940 950
AQDGSGDAVE QDVASSNAHC VAFLIKDPQK VKTVDEMRER LRMRGLRCHI
960 970 980 990 1000
MYCRNSTRLQ VVPLLASRSQ ALRYLSVRWG VSVGNMYLIT GEHGDTDLEE
1010 1020 1030 1040 1050
MLSGLHKTVI VRGVTEKGSE ALVRSPGSYK RDDVVPSETP LAAYTTGELK
1060
ADEIMRALKQ VSKTSSGM
Length:1,068
Mass (Da):118,575
Last modified:July 1, 1993 - v1
Checksum:i074679B5E9A1D282
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M97550 mRNA. Translation: AAA33513.1.
PIRiJQ1329.
RefSeqiNP_001105694.1. NM_001112224.1.
UniGeneiZm.26.

Genome annotation databases

EnsemblPlantsiGRMZM5G875238_T01; GRMZM5G875238_P01; GRMZM5G875238.
GeneIDi542711.
GrameneiGRMZM5G875238_T01; GRMZM5G875238_P01; GRMZM5G875238.
KEGGizma:542711.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M97550 mRNA. Translation: AAA33513.1.
PIRiJQ1329.
RefSeqiNP_001105694.1. NM_001112224.1.
UniGeneiZm.26.

3D structure databases

ProteinModelPortaliP31927.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi4577.GRMZM5G875238_P01.

Protein family/group databases

CAZyiGT4. Glycosyltransferase Family 4.

Proteomic databases

PaxDbiP31927.
PRIDEiP31927.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiGRMZM5G875238_T01; GRMZM5G875238_P01; GRMZM5G875238.
GeneIDi542711.
GrameneiGRMZM5G875238_T01; GRMZM5G875238_P01; GRMZM5G875238.
KEGGizma:542711.

Organism-specific databases

MaizeGDBi25294.

Phylogenomic databases

eggNOGiKOG0853. Eukaryota.
COG0438. LUCA.
HOGENOMiHOG000009685.
KOiK00696.
OMAiEMSAGNA.
OrthoDBiEOG093600RM.

Enzyme and pathway databases

UniPathwayiUPA00371; UER00545.

Gene expression databases

ExpressionAtlasiP31927. baseline and differential.
GenevisibleiP31927. ZM.

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 nameiSPSA_MAIZE
AccessioniPrimary (citable) accession number: P31927
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 1, 1993
Last sequence update: July 1, 1993
Last modified: September 7, 2016
This is version 94 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

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.