ID   EXTN_MAIZE              Reviewed;         267 AA.
AC   P14918;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=Extensin;
DE   AltName: Full=Proline-rich glycoprotein;
DE   Flags: Precursor;
GN   Name=HRGP;
OS   Zea mays (Maize).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; PACMAD clade;
OC   Panicoideae; Andropogonodae; Andropogoneae; Tripsacinae; Zea.
OX   NCBI_TaxID=4577;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. E41, and cv. Wisconsin 64A;
RX   AGRICOLA=IND92000026; DOI=10.1007/BF00039029;
RA   Stiefel V., Perez-Grau L., Albericio F., Giralt E., Ruiz-Avila L.,
RA   Ludevid M.D., Puigdomenech P.;
RT   "Molecular cloning of cDNAs encoding a putative cell wall protein from Zea
RT   mays and immunological identification of related polypeptides.";
RL   Plant Mol. Biol. 11:483-493(1988).
CC   -!- FUNCTION: Structural component in primary cell wall.
CC   -!- SUBCELLULAR LOCATION: Secreted, primary cell wall.
CC   -!- TISSUE SPECIFICITY: Mainly in the coleoptile node and root tip.
CC   -!- PTM: Hydroxylated on proline residues in the S-P-P-P-P repeat.
CC   -!- PTM: O-glycosylated on hydroxyprolines.
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DR   EMBL; X13499; CAA31854.1; -; mRNA.
DR   EMBL; X13506; CAA31860.1; -; mRNA.
DR   EMBL; M36912; AAA33455.1; -; mRNA.
DR   EMBL; M36913; AAA33456.1; -; mRNA.
DR   EMBL; M36914; AAA33457.1; -; mRNA.
DR   PIR; S08314; S08314.
DR   AlphaFoldDB; P14918; -.
DR   PRIDE; P14918; -.
DR   MaizeGDB; 17152; -.
DR   Proteomes; UP000007305; Unplaced.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-KW.
DR   GO; GO:0009530; C:primary cell wall; IEA:UniProtKB-SubCell.
DR   GO; GO:0071555; P:cell wall organization; IEA:UniProtKB-KW.
PE   2: Evidence at transcript level;
KW   Cell wall; Cell wall biogenesis/degradation; Glycoprotein; Hydroxylation;
KW   Reference proteome; Repeat; Secreted; Signal.
FT   SIGNAL          1..?
FT                   /evidence="ECO:0000255"
FT   CHAIN           ?..267
FT                   /note="Extensin"
FT                   /id="PRO_0000008729"
FT   REPEAT          18..33
FT   REPEAT          34..54
FT   REPEAT          55..70
FT   REPEAT          71..91
FT   REPEAT          92..107
FT   REPEAT          108..128
FT   REPEAT          129..144
FT   REPEAT          145..160
FT   REPEAT          161..179
FT   REPEAT          180..195
FT   REPEAT          196..211
FT   REPEAT          212..232
FT   REPEAT          233..253
FT   REGION          1..267
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          18..253
FT                   /note="Highly repetitive"
FT   REGION          261..265
FT                   /note="Extensin repetitive element"
FT   COMPBIAS        20..267
FT                   /note="Pro residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   VARIANT         245
FT                   /note="Missing (in strain: cv. E41)"
FT   VARIANT         261
FT                   /note="S -> C (in strain: cv. E41)"
SQ   SEQUENCE   267 AA;  28349 MW;  A6F406F4645FEECB CRC64;
     MCPAFSIFFN SRRYSLTPPT YTPSPKPPTP KPTPPTYTPS PKPPASKPPT PKPTPPTYTP
     SPKPPTPKPT PPTYTPSPKP PATKPPTPKP TPPTYTPSPK PPTPKPTPPT YTPSPKPPAT
     KPPTPKPTPP TYTPSPKPPT PKPTPPTYTP SPKPPTPKPT PPTYTPSPKP PTHPTPKPTP
     PTYTPSPKPP TPKPTPPTYT PSPKPPTPKP TPPTYTPSPK PPATKPPTPK PTPPTYTPTP
     KPPATKPPTY TPTPPVSHTP SPPPPYY