Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5267
Number of amino acids:408
Molecular Weight:44885.92 Da
Theoretical pI:8.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)307.35%
Cysteine CYS (C)122.94%
Glutamic Acid GLU (E)122.94%
Aspartic Acid ASP (D)245.88%
Glycine GLY (G)358.58%
Phynylalanine PHE (F)153.68%
Isoleucine ILE (I)266.37%
Histidine HIS (H)184.41%
Lysine LYS (K)215.15%
Methionine MET (M)81.96%
Leucine LEU (L)286.86%
Asparagine ASN (N)245.88%
Glutamine GLN (Q)81.96%
Proline PRO (P)153.68%
Serine SER (S)409.8%
Arginine ARG (R)235.64%
Threonine THR (T)194.66%
Tryptophan TRP (W)92.21%
Valine VAL (V)307.35%
Tyrosine TYR (Y)112.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1978
HydrogenH3081
NitrogenN575
OxygenO583
SulphurS20

FormulaC1978H3081N575O583S20
Total Number of Atoms:6237


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66640
Absorption 0.1% (=1 g/l)    1.485,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65890
Absorption 0.1% (=1 g/l)    1.468,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.15

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.17, 27.94, 19.12]

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:80.2941
Grand average of hydropathicity (GRAVY):-0.24