Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4703
Number of amino acids:494
Molecular Weight:54291.04 Da
Theoretical pI:5.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)387.69%
Cysteine CYS (C)81.62%
Glutamic Acid GLU (E)285.67%
Aspartic Acid ASP (D)336.68%
Glycine GLY (G)5010.12%
Phynylalanine PHE (F)193.85%
Isoleucine ILE (I)275.47%
Histidine HIS (H)173.44%
Lysine LYS (K)285.67%
Methionine MET (M)102.02%
Leucine LEU (L)448.91%
Asparagine ASN (N)265.26%
Glutamine GLN (Q)112.23%
Proline PRO (P)224.45%
Serine SER (S)367.29%
Arginine ARG (R)183.64%
Threonine THR (T)234.66%
Tryptophan TRP (W)71.42%
Valine VAL (V)265.26%
Tyrosine TYR (Y)234.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2418
HydrogenH3706
NitrogenN654
OxygenO736
SulphurS18

FormulaC2418H3706N654O736S18
Total Number of Atoms:7532


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):61
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    73270
Absorption 0.1% (=1 g/l)    1.350,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72770
Absorption 0.1% (=1 g/l)    1.340,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.55, 27.13, 24.29]

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:79.0081
Grand average of hydropathicity (GRAVY):-0.34