General Information

  • ID:  hor001802
  • Uniprot ID:  P91889
  • Protein name:  FIRF-amide
  • Gene name:  FMRFa
  • Organism:  Sepia officinalis (Common cuttlefish)
  • Family:  FARP (FMRFamide related peptide) family
  • Source:  Animal
  • Expression:  Present ubiquitously in the brain and regions of the central nervous system as well as in the periphery and throughout the dermal chromatophore layer (at protein level).
  • Disease:  NA
  • Comments:  NA
  • Taxonomy:  Sepia (genus), Sepiidae (family), Sepiina (suborder), Sepiida (order), Decapodiformes (superorder), Coleoidea (subclass), Cephalopoda (class), Mollusca (phylum), Lophotrochozoa, Spiralia, Protostomia, Bilateria, Eumetazoa, Metazoa (kingdom), Opisthokonta, Eukaryota (superkingdom), cellular organisms
  • GO MF:  NA
  • GO BP:  GO:0007218 neuropeptide signaling pathway
  • GO CC:  GO:0005576 extracellular region

Sequence Information

  • Sequence:  FIRF
  • Length:  4(68-71)
  • Propeptide:  MRCWSPCSLLVVIAIYCLSSHTSEAFDLAQACVESQRLSLLPICDTIFAVQQEGAQQSADDGLRSKRFIRFGRALSGDAFLRFGKNVPDLPFEDKRFLRFGRAAPQLDDLLKQALQRVESLQKSDDTSVRRKRSTDAAPQSNTDSAEQKNDSAKITKRYVDDVEDSDVKRFMRFGKRFMRFGRNPSDVGSKLTEKRFMRFGRDPEKRFMRFGKSDDKKFMRFGRNPGDAEDELEEDKRFMRFGRGDEEDEEEAEK
  • Signal peptide:  MRCWSPCSLLVVIAIYCLSSHTSEA
  • Modification:  T4 Phenylalanine amide
  • Glycosylation:  NA
  • Mutagenesis:  NA

Activity

  • Function:  Excitatory neurotransmitters that directly modulate chromatophore function by activating chromatophore expansion at the chromatophore neuromuscular junction.
  • Mechanism:  NA
  • Cross BBB:  NA
  • Target:  NA
  • Target Unid:  NA
  • IC50: NA
  • EC50: NA
  • ED50: NA
  • kd: NA
  • Half life: NA

Structure

  • Disulfide bond:  NA
  • Structure ID:  AF-P91889-F1(AlphaFold_DB_ID)

  • Structure: (PDB_ID-from https://www.rcsb.org/; AlphaFold_DB_ID-from https://alphafold.ebi.ac.uk/; hordbxxxxxx_AF2.pdb was predicted structure by AlphaFold2; hordbxxxxxx_ESM.pdb was predicted structure by ESMFold)
    •    hor001802_AF2.pdbhor001802_ESM.pdb

Physical Information

Mass: 63540 Formula: C30H43N7O5
Absent amino acids: ACDEGHKLMNPQSTVWY Common amino acids: F
pI: 10.55 Basic residues: 1
Polar residues: 0 Hydrophobic residues: 3
Hydrophobicity: 140 Boman Index: -404
Half-Life: 1.1 hour Half-Life Yeast: 3 min
Half-Life E.Coli: 2 min Aliphatic Index 97.5
Instability Index: 750 Extinction Coefficient cystines: 0
Absorbance 280nm: 0

Literature

  • PubMed ID:  11060217
  • Title:  Mass spectrometric survey of peptides in cephalopods with an emphasis on the FMRFamide-related peptides.