ID   SMP1_ARATH              Reviewed;          86 AA.
AC   Q9LE44; A0A178VH69;
DT   17-JUN-2020, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2000, sequence version 1.
DT   03-AUG-2022, entry version 129.
DE   RecName: Full=SEED MATURATION PROTEIN 1 {ECO:0000303|PubMed:20870712};
DE   AltName: Full=Late embryogenesis abundant protein SMP1 {ECO:0000303|PubMed:22837651};
GN   Name=SMP1 {ECO:0000303|PubMed:20870712};
GN   OrderedLocusNames=At3g12960 {ECO:0000312|Araport:AT3G12960};
GN   ORFNames=MGH6.8 {ECO:0000312|EMBL:BAB02504.1};
OS   Arabidopsis thaliana (Mouse-ear cress).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis.
OX   NCBI_TaxID=3702;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=cv. Columbia;
RX   PubMed=10819329; DOI=10.1093/dnares/7.2.131;
RA   Sato S., Nakamura Y., Kaneko T., Katoh T., Asamizu E., Tabata S.;
RT   "Structural analysis of Arabidopsis thaliana chromosome 3. I. Sequence
RT   features of the regions of 4,504,864 bp covered by sixty P1 and TAC
RT   clones.";
RL   DNA Res. 7:131-135(2000).
RN   [2]
RP   GENOME REANNOTATION.
RC   STRAIN=cv. Columbia;
RX   PubMed=27862469; DOI=10.1111/tpj.13415;
RA   Cheng C.Y., Krishnakumar V., Chan A.P., Thibaud-Nissen F., Schobel S.,
RA   Town C.D.;
RT   "Araport11: a complete reannotation of the Arabidopsis thaliana reference
RT   genome.";
RL   Plant J. 89:789-804(2017).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   STRAIN=cv. Columbia;
RA   Kim C.J., Chen H., Cheuk R.F., Shinn P., Ecker J.R.;
RT   "Arabidopsis cDNA clones.";
RL   Submitted (JUN-2004) to the EMBL/GenBank/DDBJ databases.
RN   [4]
RP   FUNCTION, AND DISRUPTION PHENOTYPE.
RC   STRAIN=cv. Columbia, and cv. Landsberg erecta;
RX   PubMed=20870712; DOI=10.1074/jbc.m110.157008;
RA   Chen T., Nayak N., Majee S.M., Lowenson J., Schaefermeyer K.R.,
RA   Eliopoulos A.C., Lloyd T.D., Dinkins R., Perry S.E., Forsthoefel N.R.,
RA   Clarke S.G., Vernon D.M., Zhou Z.S., Rejtar T., Downie A.B.;
RT   "Substrates of the Arabidopsis thaliana protein isoaspartyl
RT   methyltransferase 1 identified using phage display and biopanning.";
RL   J. Biol. Chem. 285:37281-37292(2010).
RN   [5]
RP   FUNCTION, AND MISCELLANEOUS.
RX   PubMed=22837651; DOI=10.3390/ijms13066582;
RA   Kushwaha R., Lloyd T.D., Schaefermeyer K.R., Kumar S., Downie A.B.;
RT   "Identification of late embryogenesis abundant (LEA) protein putative
RT   interactors using phage display.";
RL   Int. J. Mol. Sci. 13:6582-6603(2012).
CC   -!- FUNCTION: Protein chaperone involved in seed maturation and dormancy
CC       maintenance after high temperature fluctuation (e.g. secondary dormancy
CC       after 3 days at 40 degrees Celsius), probably by protecting heat labile
CC       proteins required for secondary dormancy (e.g. G6PDH, HOP3, SR45,
CC       ECP63, SCL33, RPL32B, ChlADR1, MSBP1, MBF1B, At3g01690, At1g15280,
CC       At1g15290, At2g31410, At1g11630, At1g65090, EMB2279, EMB1674 and
CC       RPL35C). {ECO:0000269|PubMed:20870712, ECO:0000269|PubMed:22837651}.
CC   -!- DISRUPTION PHENOTYPE: Increased seed germination rate after high
CC       temperature fluctuation due to a reduced seed dormancy; fail to enter
CC       secondary dormancy after 3 days at 40 degrees Celsius.
CC       {ECO:0000269|PubMed:20870712}.
CC   -!- MISCELLANEOUS: Boiling-stable protein. {ECO:0000269|PubMed:22837651}.
CC   -!- SIMILARITY: Belongs to the LEA type 3 family. {ECO:0000305}.
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DR   EMBL; AB026645; BAB02504.1; -; Genomic_DNA.
DR   EMBL; CP002686; AEE75267.1; -; Genomic_DNA.
DR   EMBL; BT014911; AAT46040.1; -; mRNA.
DR   EMBL; BT015752; AAU84689.1; -; mRNA.
DR   RefSeq; NP_187902.1; NM_112133.4.
DR   AlphaFoldDB; Q9LE44; -.
DR   STRING; 3702.AT3G12960.1; -.
DR   PaxDb; Q9LE44; -.
DR   PRIDE; Q9LE44; -.
DR   ProMEX; Q9LE44; -.
DR   ProteomicsDB; 179200; -.
DR   DNASU; 820482; -.
DR   EnsemblPlants; AT3G12960.1; AT3G12960.1; AT3G12960.
DR   GeneID; 820482; -.
DR   Gramene; AT3G12960.1; AT3G12960.1; AT3G12960.
DR   KEGG; ath:AT3G12960; -.
DR   Araport; AT3G12960; -.
DR   TAIR; locus:2089265; AT3G12960.
DR   eggNOG; ENOG502S78Z; Eukaryota.
DR   HOGENOM; CLU_165774_2_0_1; -.
DR   InParanoid; Q9LE44; -.
DR   OMA; IRVSYKH; -.
DR   OrthoDB; 1618903at2759; -.
DR   PhylomeDB; Q9LE44; -.
DR   PRO; PR:Q9LE44; -.
DR   Proteomes; UP000006548; Chromosome 3.
DR   ExpressionAtlas; Q9LE44; baseline and differential.
DR   GO; GO:0044183; F:protein folding chaperone; IDA:UniProtKB.
DR   GO; GO:0010231; P:maintenance of seed dormancy; IMP:UniProtKB.
DR   GO; GO:0009408; P:response to heat; IMP:UniProtKB.
DR   GO; GO:0010162; P:seed dormancy process; IMP:TAIR.
DR   InterPro; IPR044984; SMP1.
DR   PANTHER; PTHR37732; PTHR37732; 1.
PE   3: Inferred from homology;
KW   Chaperone; Developmental protein; Reference proteome; Stress response.
FT   CHAIN           1..86
FT                   /note="SEED MATURATION PROTEIN 1"
FT                   /id="PRO_0000450285"
FT   REGION          52..86
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        53..69
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        70..86
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   86 AA;  9464 MW;  1EE66D71919B618D CRC64;
     MAKNKDDIKY ATAQAKLSED EAIRVSYKHG TPLEGGKIAE SEPVELFSSA QRIEKGKEQS
     AASGDQTQIQ RDIKDIKGTR TDDSPR