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UniProtKB/Swiss-Prot entry P50984


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name CXAA_CONPE
Primary accession number P50984
Secondary accession numbers None
Integrated into Swiss-Prot on October 1, 1996
Sequence was last modified on October 1, 1996 (Sequence version 1)
Annotations were last modified on    November 25, 2008 (Entry version 54)
Name and origin of the protein
Protein name Alpha-conotoxin PnIA
Synonym Alpha-PnIA
Gene name None
From
Conus pennaceus (Feathered cone) [TaxID: 37335] 
Taxonomy Eukaryota; Metazoa; Mollusca; Gastropoda; Orthogastropoda; Apogastropoda; Caenogastropoda; Sorbeoconcha; Hypsogastropoda; Neogastropoda; Conoidea; Conidae; Conus.
Protein existence 1: Evidence at protein level;
References
[1]
PROTEIN SEQUENCE, AND FUNCTION.
TISSUE=Venom;
DOI=10.1021/bi00198a018; PubMed=8068627 [NCBI, ExPASy, EBI, Israel, Japan]
Fainzilber M., Hasson A., Oren R., Burlingame A.L., Gordon D., Spira M.E., Zlotkin E.;
"New mollusc-specific alpha-conotoxins block Aplysia neuronal acetylcholine receptors.";
Biochemistry 33:9523-9529(1994).
[2]
SULFATION AT TYR-15.
DOI=10.1002/(SICI)1096-9888(199904)34:4<447::AID-JMS801>3.3.CO;2-T; PubMed=10226369 [NCBI, ExPASy, EBI, Israel, Japan]
Wolfender J.L., Chu F., Ball H., Wolfender F., Fainzilber M., Baldwin M.A., Burlingame A.L.;
"Identification of tyrosine sulfation in Conus pennaceus conotoxins alpha-PnIA and alpha-PnIB: further investigation of labile sulfo- and phosphopeptides by electrospray, matrix-assisted laser desorption/ionization (MALDI) and atmospheric pressure MALDI mass spectrometry.";
J. Mass Spectrom. 34:447-454(1999).
[3]
FUNCTION, SYNTHESIS, AND MUTAGENESIS OF ALA-10 AND ASN-11.
DOI=10.1021/bi991252j; PubMed=10545176 [NCBI, ExPASy, EBI, Israel, Japan]
Luo S., Nguyen T.A., Cartier G.E., Olivera B.M., Yoshikami D., McIntosh J.M.;
"Single-residue alteration in alpha-conotoxin PnIA switches its nAChR subtype selectivity.";
Biochemistry 38:14542-14548(1999).
[4]
X-RAY CRYSTALLOGRAPHY (2.4 ANGSTROMS), AND DISULFIDE BONDS.
DOI=10.1016/S0969-2126(96)00047-0; PubMed=8740364 [NCBI, ExPASy, EBI, Israel, Japan]
Hu S.-H., Gehrmann J., Guddat L.W., Alewood P.F., Craik D.J., Martin J.L.;
"The 1.1 A crystal structure of the neuronal acetylcholine receptor antagonist, alpha-conotoxin PnIA from Conus pennaceus.";
Structure 4:417-423(1996).
Comments
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
PIR A54877; A54877.
3D structure databases
PDB
1PEN; X-ray; 1.10 A; A=1-16.[ExPASy / RCSB / EBI]
2BR8; X-ray; 2.40 A; F/G/H/I/J=1-16.[ExPASy / RCSB / EBI]
Detailed list of linked structures.
PDBsum 1PEN; -.
2BR8; -.
ModBase P50984.
Ontologies
GO
GO:0005576; Cellular component: extracellular region (inferred from electronic annotation from InterPro).
GO:0045211; Cellular component: postsynaptic membrane (inferred from electronic annotation from UniProtKB-KW).
GO:0030550; Molecular function: acetylcholine receptor inhibitor activity (inferred from electronic annotation from InterPro).
GO:0009405; Biological process: pathogenesis (inferred from electronic annotation from InterPro).
GO:0007268; Biological process: synaptic transmission (inferred from electronic annotation from UniProtKB-KW).
QuickGo view.
Family and domain databases
InterPro IPR009958; Conotoxin_a-typ.
Graphical view of domain structure.
PROSITE PS60014; ALPHA_CONOTOXIN; 1.
Other
ProtoNet P50984.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
3D-structure; Acetylcholine receptor inhibitor; Amidation; Direct protein sequencing; Neurotoxin; Postsynaptic neurotoxin; Secreted; Sulfation; Toxin.
Features
SEVIEWER logo Feature table viewer
KeyFrom  To Length Description FTId
PEPTIDE   1   16  16     Alpha-conotoxin PnIA. PRO_0000044462
MOD_RES   15   15        Sulfotyrosine. 
MOD_RES   16   16        Cysteine amide. 
DISULFID   2    8         
DISULFID   3   16         
MUTAGEN   10   10        A->L: Blocks nAChr alpha-7 subunits with higher potency than PnIA and PnIB. Blocks nAChR alpha-3/beta-2 subunits with a potency range between the potency of PnIA and PnIB. 
MUTAGEN   11   11        N->S: Blocks nAChR alpha-7 subunits with lower potency than PnIA and PnIB. Blocks nAChR alpha-3/beta-2 subunits with a potency range between the potency of PnIA and PnIB. 
HELIX   2    4  3      
HELIX   6   11  6      
TURN   13   15  3      
Sequence information
Length: 16 AA [This is the length of the unprocessed precursor] Molecular weight: 1628 Da [This is the MW of the unprocessed precursor] CRC64: 05310FF95EC99005 [This is a checksum on the sequence]
        10 
GCCSLPPCAA NNPDYC 

P50984 in FASTA format

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