Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4249
Number of amino acids:503
Molecular Weight:53899.46 Da
Theoretical pI:5.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)7013.92%
Cysteine CYS (C)81.59%
Glutamic Acid GLU (E)132.58%
Aspartic Acid ASP (D)397.75%
Glycine GLY (G)469.15%
Phynylalanine PHE (F)244.77%
Isoleucine ILE (I)101.99%
Histidine HIS (H)122.39%
Lysine LYS (K)173.38%
Methionine MET (M)101.99%
Leucine LEU (L)458.95%
Asparagine ASN (N)112.19%
Glutamine GLN (Q)152.98%
Proline PRO (P)265.17%
Serine SER (S)469.15%
Arginine ARG (R)244.77%
Threonine THR (T)214.17%
Tryptophan TRP (W)71.39%
Valine VAL (V)336.56%
Tyrosine TYR (Y)265.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2408
HydrogenH3649
NitrogenN649
OxygenO727
SulphurS18

FormulaC2408H3649N649O727S18
Total Number of Atoms:7451


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77740
Absorption 0.1% (=1 g/l)    1.442,   assuming all pairs of CYS residues form cystines

Ext. coefficient    77240
Absorption 0.1% (=1 g/l)    1.433,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.83, 25.65, 27.44]

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:75.5865
Grand average of hydropathicity (GRAVY):-0.10