Q9SW93 (SCA_LILLO) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Stigma/stylar cysteine-rich adhesin

Alternative name(s):
Lipid transfer protein

Gene names

Name:	SCA
Synonyms:	LTP

Organism

Lilium longiflorum (Trumpet lily)

Taxonomic identifier

4690 [NCBI]

Taxonomic lineage

cellular organisms › Eukaryota › Viridiplantae › Streptophyta › Streptophytina › Embryophyta › Tracheophyta › Euphyllophyta › Spermatophyta › Magnoliophyta › Liliopsida › Liliales › Liliaceae › Lilium

Protein attributes

Sequence length	113 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	Acts as an adhesive agent between the pollen tube wall and the stylar transmitting tract epidermis. Binds a stylar pectin in a pH-dependent manner. Enhances activity of chemocyanin, a diffusible chemotropic factor.
Tissue specificity	Highly expressed in style and stigma, abundant in young leaves and petals, and low expression in young anthers at pollen mother cell stage with an active tapetum. Not expressed in mature leaves or in pollen grains or tubes. Found in the stylar transmitting tract epidermis and in the stylar extracellular matrix. Ref.1 Ref.3
Developmental stage	Expressed throughout development of the stigma and style, and then decreases at 6 days after anthesis. Ref.3
Sequence similarities	Belongs to the plant LTP family.

Ontologies

Keywords
Biological process	Transport
Domain	Signal
Ligand	Lipid-binding
PTM	Disulfide bond
Technical term	Direct protein sequencing
Gene Ontology (GO)
Biological_process	lipid transport Inferred from electronic annotation. Source: InterPro
Molecular_function	lipid binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Signal peptide	1 – 22	22	Ref.1
	Chain	23 – 113	91	Stigma/stylar cysteine-rich adhesin		PRO_0000018417
Amino acid modifications
	Disulfide bond	25 ↔ 72		By similarity
	Disulfide bond	35 ↔ 49		By similarity
	Disulfide bond	50 ↔ 95		By similarity
	Disulfide bond	70 ↔ 109		By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q9SW93 [UniParc]. Last modified May 1, 2000. Version 1. Checksum: F2E3D9725EFBE83A	FASTA	113	11,686
	10 20 30 40 50 60 MARSSAVCFL LLLAFLIGTA SAITCGQVDS DLTSCLGYAR KGGVIPPGCC AGVRTLNNLA 70 80 90 100 110 KTTPDRQTAC NCLKSLVNPS LGLNAAIVAG IPGKCGVNIP YPIRMQTDCN KVR

References

[1]	"A lipid transfer-like protein is necessary for lily pollen tube adhesion to an in vitro stylar matrix." Park S.Y., Jauh G.Y., Mollet J.-C., Eckard K.J., Nothnagel E.A., Walling L.L., Lord E.M. Plant Cell 12:151-164(2000) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 23-57, TISSUE SPECIFICITY. Strain: cv. Nellie white.
[2]	"A lily stylar pectin is necessary for pollen tube adhesion to an in vitro stylar matrix." Mollet J.-C., Park S.Y., Nothnagel E.A., Lord E.M. Plant Cell 12:1737-1750(2000) [PubMed] [Europe PMC] [Abstract] Cited for: PECTIN BINDING.
[3]	"Expression studies of SCA in lily and confirmation of its role in pollen tube adhesion." Park S.Y., Lord E.M. Plant Mol. Biol. 51:183-189(2003) [PubMed] [Europe PMC] [Abstract] Cited for: TISSUE SPECIFICITY, DEVELOPMENTAL STAGE.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AF171094 mRNA. Translation: AAD46683.1.
3D structure databases
ProteinModelPortal	Q9SW93.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Family and domain databases
InterPro	IPR016140. Bifunc_inhib/LTP/seed_store. IPR000528. Plant_LTP. [Graphical view]
Pfam	PF00234. Tryp_alpha_amyl. 1 hit. [Graphical view]
PRINTS	PR00382. LIPIDTRNSFER.
SMART	SM00499. AAI. 1 hit. [Graphical view]
SUPFAM	SSF47699. Bifunc_inhib/LTP/seed_store. 1 hit.
PROSITE	PS00597. PLANT_LTP. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

SCA_LILLO

Accession

Primary (citable) accession number: Q9SW93

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 1, 2004
Last sequence update:	May 1, 2000
Last modified:	March 6, 2013
This is version 51 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Plant Protein Annotation Program