Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5397
Number of amino acids:500
Molecular Weight:56343.87 Da
Theoretical pI:5.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)377.4%
Cysteine CYS (C)20.4%
Glutamic Acid GLU (E)295.8%
Aspartic Acid ASP (D)346.8%
Glycine GLY (G)397.8%
Phynylalanine PHE (F)214.2%
Isoleucine ILE (I)214.2%
Histidine HIS (H)91.8%
Lysine LYS (K)306%
Methionine MET (M)132.6%
Leucine LEU (L)408%
Asparagine ASN (N)183.6%
Glutamine GLN (Q)214.2%
Proline PRO (P)224.4%
Serine SER (S)336.6%
Arginine ARG (R)255%
Threonine THR (T)224.4%
Tryptophan TRP (W)81.6%
Valine VAL (V)469.2%
Tyrosine TYR (Y)306%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2542
HydrogenH3900
NitrogenN670
OxygenO751
SulphurS15

FormulaC2542H3900N670O751S15
Total Number of Atoms:7878


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):63
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88825
Absorption 0.1% (=1 g/l)    1.576,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88700
Absorption 0.1% (=1 g/l)    1.574,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.20, 22.40, 23.80]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:81.66
Grand average of hydropathicity (GRAVY):-0.32