BDS3_BUNGR
ID BDS3_BUNGR Reviewed; 41 AA.
AC G0W2H7;
DT 22-JUL-2015, integrated into UniProtKB/Swiss-Prot.
DT 19-OCT-2011, sequence version 1.
DT 25-MAY-2022, entry version 21.
DE RecName: Full=U-AITX-Bg1a {ECO:0000303|PubMed:22015268};
DE Flags: Fragment;
OS Bunodosoma granuliferum (Red warty sea anemone).
OC Eukaryota; Metazoa; Cnidaria; Anthozoa; Hexacorallia; Actiniaria;
OC Actiniidae; Bunodosoma.
OX NCBI_TaxID=31164;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RX PubMed=22015268; DOI=10.1016/j.peptides.2011.10.011;
RA Rodriguez A.A., Cassoli J.S., Sa F., Dong Z.Q., de Freitas J.C.,
RA Pimenta A.M., de Lima M.E., Konno K., Lee S.M., Garateix A.,
RA Zaharenko A.J.;
RT "Peptide fingerprinting of the neurotoxic fractions isolated from the
RT secretions of sea anemones Stichodactyla helianthus and Bunodosoma
RT granulifera. New members of the APETx-like family identified by a 454
RT pyrosequencing approach.";
RL Peptides 34:26-38(2012).
CC -!- FUNCTION: Potently and selectively inhibits voltage-gated potassium
CC channels Kv11/KCNH/ERG. Acts as a gating-modifier toxin that shifts the
CC voltage-dependence of ERG activation in the positive direction and
CC suppresses its current amplitudes elicited by strong depolarizing
CC pulses that maximally activate the channels.
CC {ECO:0000250|UniProtKB:P61541}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000305}. Nematocyst {ECO:0000305}.
CC -!- MISCELLANEOUS: Does not show effect on crabs.
CC {ECO:0000269|PubMed:22015268}.
CC -!- MISCELLANEOUS: May correspond to the Bg30.66b fraction with a molecular
CC mass of 4593.5 Da (with residues Gly and Thr at the N-terminus of the
CC fragment (assigned by homology)). {ECO:0000305|PubMed:22015268}.
CC -!- SIMILARITY: Belongs to the sea anemone type 3 (BDS) potassium channel
CC toxin family. {ECO:0000305}.
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DR EMBL; HE577144; CCC86602.1; -; mRNA.
DR AlphaFoldDB; G0W2H7; -.
DR SMR; G0W2H7; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0042151; C:nematocyst; IEA:UniProtKB-SubCell.
DR GO; GO:0008200; F:ion channel inhibitor activity; IEA:InterPro.
DR GO; GO:0015459; F:potassium channel regulator activity; IEA:UniProtKB-KW.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR Gene3D; 2.20.20.10; -; 1.
DR InterPro; IPR012414; BDS_K_chnl_tox.
DR InterPro; IPR023355; Myo_ane_neurotoxin_sf.
DR Pfam; PF07936; Defensin_4; 1.
PE 2: Evidence at transcript level;
KW Cleavage on pair of basic residues; Disulfide bond;
KW Ion channel impairing toxin; Nematocyst; Neurotoxin;
KW Potassium channel impairing toxin; Secreted; Toxin;
KW Voltage-gated potassium channel impairing toxin.
FT CHAIN <1..41
FT /note="U-AITX-Bg1a"
FT /id="PRO_0000433586"
FT DISULFID 2..35
FT /evidence="ECO:0000250|UniProtKB:P61541"
FT DISULFID 4..28
FT /evidence="ECO:0000250|UniProtKB:P61541"
FT DISULFID 18..36
FT /evidence="ECO:0000250|UniProtKB:P61541"
FT NON_TER 1
SQ SEQUENCE 41 AA; 4429 MW; 88C80DA416C66FEA CRC64;
PCFCGKTVGI YWFALYSCPG GYGYTGHCGH FMGVCCYPAN P