ID   KRFA_CHICK              Reviewed;          98 AA.
AC   P20308;
DT   01-FEB-1991, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 81.
DE   RecName: Full=Feather keratin 4;
DE   AltName: Full=F-ker;
DE   AltName: Full=Keratin gene A protein;
OS   Gallus gallus (Chicken).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC   Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae;
OC   Phasianinae; Gallus.
OX   NCBI_TaxID=9031;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2479754; DOI=10.1016/0022-2836(89)90593-7;
RA   Presland R.B., Gregg K., Molloy P.L., Morris C.P., Crocker L.A.,
RA   Rogers G.E.;
RT   "Avian keratin genes. I. A molecular analysis of the structure and
RT   expression of a group of feather keratin genes.";
RL   J. Mol. Biol. 209:549-559(1989).
CC   -!- SUBUNIT: The avian keratins (F-ker, S-ker, C-ker and B-ker) are a
CC       complex mixture of very similar polypeptides.
CC   -!- SIMILARITY: Belongs to the avian keratin family. {ECO:0000305}.
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DR   EMBL; X17511; CAA35556.1; -; Genomic_DNA.
DR   PIR; S06808; S06808.
DR   AlphaFoldDB; P20308; -.
DR   PaxDb; P20308; -.
DR   PRIDE; P20308; -.
DR   VEuPathDB; HostDB:LOC428291; -.
DR   eggNOG; ENOG502TDE8; Eukaryota.
DR   PhylomeDB; P20308; -.
DR   Proteomes; UP000000539; Unplaced.
DR   GO; GO:0005882; C:intermediate filament; IEA:UniProtKB-KW.
DR   GO; GO:0005200; F:structural constituent of cytoskeleton; IEA:InterPro.
DR   InterPro; IPR003461; Keratin.
DR   PANTHER; PTHR31203; PTHR31203; 1.
DR   Pfam; PF02422; Keratin; 1.
PE   3: Inferred from homology;
KW   Acetylation; Keratin; Reference proteome.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..98
FT                   /note="Feather keratin 4"
FT                   /id="PRO_0000096997"
FT   MOD_RES         2
FT                   /note="N-acetylserine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   98 AA;  10104 MW;  43DE542F993EBF90 CRC64;
     MSCYDLCRPS APTPLANSCN EPCVRQCQDS RVVIQPSPVV VTLPGPILSS FPQNTAVGSS
     TSAAVGSILS EEGVPISSGG FGISGLGSRF SSRRCLPY