Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5829
Number of amino acids:368
Molecular Weight:40575.87 Da
Theoretical pI:9.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)297.88%
Cysteine CYS (C)82.17%
Glutamic Acid GLU (E)71.9%
Aspartic Acid ASP (D)184.89%
Glycine GLY (G)338.97%
Phynylalanine PHE (F)133.53%
Isoleucine ILE (I)267.07%
Histidine HIS (H)123.26%
Lysine LYS (K)184.89%
Methionine MET (M)123.26%
Leucine LEU (L)225.98%
Asparagine ASN (N)184.89%
Glutamine GLN (Q)82.17%
Proline PRO (P)236.25%
Serine SER (S)277.34%
Arginine ARG (R)267.07%
Threonine THR (T)174.62%
Tryptophan TRP (W)71.9%
Valine VAL (V)318.42%
Tyrosine TYR (Y)133.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1810
HydrogenH2843
NitrogenN521
OxygenO502
SulphurS20

FormulaC1810H2843N521O502S20
Total Number of Atoms:5696


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58370
Absorption 0.1% (=1 g/l)    1.439,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.426,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 27.45, 19.02]

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:83.1793
Grand average of hydropathicity (GRAVY):-0.13