ID   CHS3_EXOJE              Reviewed;         197 AA.
AC   P30587;
DT   01-APR-1993, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1993, sequence version 1.
DT   25-MAY-2022, entry version 72.
DE   RecName: Full=Chitin synthase 3;
DE            EC=2.4.1.16;
DE   AltName: Full=Chitin-UDP acetyl-glucosaminyl transferase 3;
DE   AltName: Full=Class-III chitin synthase 3;
DE   Flags: Fragment;
GN   Name=CHS3;
OS   Exophiala jeanselmei (Dematiaceous fungus) (Phialophora jeanselmei).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Chaetothyriomycetidae; Chaetothyriales; Herpotrichiellaceae; Exophiala.
OX   NCBI_TaxID=5584;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1731323; DOI=10.1073/pnas.89.2.519;
RA   Bowen A.R., Chen-Wu J.L.-P., Momany M., Young R., Szaniszlo P.J.,
RA   Robbins P.W.;
RT   "Classification of fungal chitin synthases.";
RL   Proc. Natl. Acad. Sci. U.S.A. 89:519-523(1992).
CC   -!- FUNCTION: Polymerizes chitin, a structural polymer of the cell wall and
CC       septum, by transferring the sugar moiety of UDP-GlcNAc to the non-
CC       reducing end of the growing chitin polymer. {ECO:0000305}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[(1->4)-N-acetyl-beta-D-glucosaminyl](n) + UDP-N-acetyl-alpha-
CC         D-glucosamine = [(1->4)-N-acetyl-beta-D-glucosaminyl](n+1) + H(+) +
CC         UDP; Xref=Rhea:RHEA:16637, Rhea:RHEA-COMP:9593, Rhea:RHEA-COMP:9595,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17029, ChEBI:CHEBI:57705,
CC         ChEBI:CHEBI:58223; EC=2.4.1.16;
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000305}; Multi-pass membrane
CC       protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the chitin synthase family. Class III subfamily.
CC       {ECO:0000305}.
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DR   EMBL; M82946; AAA33333.1; -; Genomic_DNA.
DR   AlphaFoldDB; P30587; -.
DR   CAZy; GT2; Glycosyltransferase Family 2.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004100; F:chitin synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0071555; P:cell wall organization; IEA:UniProtKB-KW.
DR   GO; GO:0006031; P:chitin biosynthetic process; IEA:InterPro.
DR   InterPro; IPR004835; Chitin_synth.
DR   InterPro; IPR004834; Chitin_synth_fun.
DR   PANTHER; PTHR22914; PTHR22914; 1.
DR   Pfam; PF01644; Chitin_synth_1; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Cell wall biogenesis/degradation; Glycosyltransferase;
KW   Membrane; Transferase; Transmembrane.
FT   CHAIN           <1..>197
FT                   /note="Chitin synthase 3"
FT                   /id="PRO_0000193699"
FT   NON_TER         1
FT   NON_TER         197
SQ   SEQUENCE   197 AA;  21778 MW;  CFC251CF347DDF29 CRC64;
     SLDGAHAPWC DAEHRDIVNL KKSEFWNKGG PAWQKIVVCL VFDGIDPCDK NTLDLLATVG
     IYQDGVMKKD VDGKDTVVHI FEYTTQLSVT PNQQLIRPND NDSTSLPPVQ MIFCLKQKNS
     KKINSHRWLF NGFGRILNPE VCILLDAGTK PGPKSLMALW EAFYNDKDLG GACGEIHAML
     GRGGVFGRKL LNPLVAA