Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4584
Number of amino acids:497
Molecular Weight:55105.55 Da
Theoretical pI:5.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.24%
Cysteine CYS (C)102.01%
Glutamic Acid GLU (E)295.84%
Aspartic Acid ASP (D)275.43%
Glycine GLY (G)418.25%
Phynylalanine PHE (F)193.82%
Isoleucine ILE (I)204.02%
Histidine HIS (H)173.42%
Lysine LYS (K)326.44%
Methionine MET (M)183.62%
Leucine LEU (L)418.25%
Asparagine ASN (N)255.03%
Glutamine GLN (Q)204.02%
Proline PRO (P)285.63%
Serine SER (S)377.44%
Arginine ARG (R)132.62%
Threonine THR (T)204.02%
Tryptophan TRP (W)61.21%
Valine VAL (V)346.84%
Tyrosine TYR (Y)244.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2455
HydrogenH3769
NitrogenN653
OxygenO736
SulphurS28

FormulaC2455H3769N653O736S28
Total Number of Atoms:7641


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):56
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    69385
Absorption 0.1% (=1 g/l)    1.259,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68760
Absorption 0.1% (=1 g/l)    1.248,   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 : 39.03

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.97, 26.36, 24.95]

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:74.9497
Grand average of hydropathicity (GRAVY):-0.34