P31927 (SPSA_MAIZE) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Sucrose-phosphate synthase
EC=2.4.1.14

Alternative name(s):
UDP-glucose-fructose-phosphate glucosyltransferase

Gene names

Name:

SPS

Organism

Zea mays (Maize)

Taxonomic identifier

4577 [NCBI]

Taxonomic lineage

Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliophyta › Liliopsida › Poales › Poaceae › PACMAD clade › Panicoideae › Andropogoneae › Zea

Protein attributes

Sequence length	1068 AA.
Sequence status	Complete.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	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. Ref.1
Catalytic activity	UDP-glucose + D-fructose 6-phosphate = UDP + sucrose 6(F)-phosphate.
Enzyme regulation	Activity is regulated by phosphorylation and moderated by concentration of metabolites and light By similarity.
Pathway	Glycan biosynthesis; sucrose biosynthesis; sucrose from D-fructose 6-phosphate and UDP-alpha-D-glucose: step 1/2.
Subunit structure	Homodimer or homotetramer.
Developmental stage	Germinating seeds or mature leaves.
Sequence similarities	Belongs to the glycosyltransferase 1 family.

Ontologies

Keywords
Molecular function	Glycosyltransferase Transferase
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological process	biosynthetic process Inferred from electronic annotation. Source: InterPro sucrose metabolic process Inferred from electronic annotation. Source: InterPro
Molecular function	sucrose-phosphate synthase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 1068	1068	Sucrose-phosphate synthase		PRO_0000204671
Regions
	Compositional bias	25 – 31	7	Poly-Gly

Sequences

	Sequence		Length	Mass (Da)
	P31927 [UniParc]. Last modified July 1, 1993. Version 1. Checksum: 074679B5E9A1D282	FASTA	1,068	118,575
	10 20 30 40 50 60 MAGNEWINGY LEAILDSHTS SRGAGGGGGG GDPRSPTKAA SPRGAHMNFN PSHYFVEEVV 70 80 90 100 110 120 KGVDESDLHR TWIKVVATRN ARERSTRLEN MCWRIWHLAR KKKQLELEGI QRISARRKEQ 130 140 150 160 170 180 EQVRREATED LAEDLSEGEK GDTIGELAPV ETTKKKFQRN FSDLTVWSDD NKEKKLYIVL 190 200 210 220 230 240 ISVHGLVRGE NMELGRDSDT GGQVKYVVEL ARAMSMMPGV YRVDLFTRQV SSPDVDWSYG 250 260 270 280 290 300 EPTEMLCAGS NDGEGMGESG GAYIVRIPCG PRDKYLKKEA LWPYLQEFVD GALAHILNMS 310 320 330 340 350 360 KALGEQVGNG RPVLPYVIHG HYADAGDVAA LLSGALNVPM VLTGHSLGRN KLEQLLKQGR 370 380 390 400 410 420 MSKEEIDSTY KIMRRIEGEE LALDASELVI TSTRQEIDEQ WGLYDGFDVK LEKVLRARAR 430 440 450 460 470 480 RGVSCHGRYM PRMVVIPPGM DFSNVVVHED IDGDGDVKDD IVGLEGASPK SMPPIWAEVM 490 500 510 520 530 540 RFLTNPHKPM ILALSRPDPK KNITTLVKAF GECRPLRELA NLTLIMGNRD DIDDMSAGNA 550 560 570 580 590 600 SVLTTVLKLI DKYDLYGSVA FPKHHNQADV PEIYRLAAKM KGVFINPALV EPFGLTLIEA 610 620 630 640 650 660 AAHGLPIVAT KNGGPVDITN ALNNGLLVDP HDQNAIADAL LKLVADKNLW QECRRNGLRN 670 680 690 700 710 720 IHLYSWPEHC RTYLTRVAGC RLRNPRWLKD TPADAGADEE EFLEDSMDAQ DLSLRLSIDG 730 740 750 760 770 780 EKSSLNTNDP LWFDPQDQVQ KIMNNIKQSS ALPPSMSSVA AEGTGSTMNK YPLLRRRRRL 790 800 810 820 830 840 FVIAVDCYQD DGRASKKMLQ VIQEVFRAVR SDSQMFKISG FTLSTAMPLS ETLQLLQLGK 850 860 870 880 890 900 IPATDFDALI CGSGSEVYYP GTANCMDAEG KLRPDQDYLM HISHRWSHDG ARQTIAKLMG 910 920 930 940 950 960 AQDGSGDAVE QDVASSNAHC VAFLIKDPQK VKTVDEMRER LRMRGLRCHI MYCRNSTRLQ 970 980 990 1000 1010 1020 VVPLLASRSQ ALRYLSVRWG VSVGNMYLIT GEHGDTDLEE MLSGLHKTVI VRGVTEKGSE 1030 1040 1050 1060 ALVRSPGSYK RDDVVPSETP LAAYTTGELK ADEIMRALKQ VSKTSSGM

References

[1]

"Expression of a maize sucrose phosphate synthase in tomato alters leaf carbohydrate partitioning." Worrell A.C., Bruneau J.-M., Summerfelt K., Boersig M., Voelker T.A. Plant Cell 3:1121-1130(1991) [PubMed: 1840396] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 71-74; 206-212; 471-481 AND 872-892, FUNCTION. Strain: cv. Pioneer 3184. Tissue: Leaf.

Cross-references

Sequence databases
EMBL GenBank DDBJ	M97550 mRNA. Translation: AAA33513.1.
PIR	JQ1329.
RefSeq	NP_001105694.1. NM_001112224.1.
UniGene	Zm.94295.
3D structure databases
ProteinModelPortal	P31927.
ModBase	Search...
Protein family/group databases
CAZy	GT4. Glycosyltransferase Family 4.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblPlants	GRMZM5G875238_T01; GRMZM5G875238_P01; GRMZM5G875238.
GeneID	542711.
KEGG	zma:542711.
Organism-specific databases
Gramene	P31927.
MaizeGDB	25294.
Phylogenomic databases
GeneTree	EPGT00070000028351.
PhylomeDB	P31927.
Family and domain databases
InterPro	IPR001296. Glyco_trans_1. IPR006380. Sucrose-P_synthase. IPR000368. Sucrose_synth. IPR012819. SucrsPsyn_pln. [Graphical view]
KO	K00696.
Pfam	PF00534. Glycos_transf_1. 1 hit. PF05116. S6PP. 1 hit. PF00862. Sucrose_synth. 1 hit. [Graphical view]
TIGRFAMs	TIGR02468. SucrsPsyn_pln. 1 hit.
ProtoNet	Search...

Entry information

Entry name

SPSA_MAIZE

Accession

Primary (citable) accession number: P31927

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 1, 1993
Last sequence update:	July 1, 1993
Last modified:	January 25, 2012
This is version 68 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Plant Protein Annotation Program