Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5398
Number of amino acids:464
Molecular Weight:53027.41 Da
Theoretical pI:6.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)296.25%
Cysteine CYS (C)30.65%
Glutamic Acid GLU (E)265.6%
Aspartic Acid ASP (D)214.53%
Glycine GLY (G)316.68%
Phynylalanine PHE (F)204.31%
Isoleucine ILE (I)204.31%
Histidine HIS (H)224.74%
Lysine LYS (K)214.53%
Methionine MET (M)81.72%
Leucine LEU (L)255.39%
Asparagine ASN (N)245.17%
Glutamine GLN (Q)122.59%
Proline PRO (P)286.03%
Serine SER (S)377.97%
Arginine ARG (R)183.88%
Threonine THR (T)296.25%
Tryptophan TRP (W)153.23%
Valine VAL (V)429.05%
Tyrosine TYR (Y)337.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2423
HydrogenH3560
NitrogenN634
OxygenO694
SulphurS11

FormulaC2423H3560N634O694S11
Total Number of Atoms:7322


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    131795
Absorption 0.1% (=1 g/l)    2.485,   assuming all pairs of CYS residues form cystines

Ext. coefficient    131670
Absorption 0.1% (=1 g/l)    2.483,   assuming all CYS residues are reduced
Aromaticity:0.147

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.26

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.41, 25.86, 18.97]

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:70.3232
Grand average of hydropathicity (GRAVY):-0.42