Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5275
Number of amino acids:387
Molecular Weight:42652.46 Da
Theoretical pI:5.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)379.56%
Cysteine CYS (C)10.26%
Glutamic Acid GLU (E)246.2%
Aspartic Acid ASP (D)205.17%
Glycine GLY (G)225.68%
Phynylalanine PHE (F)194.91%
Isoleucine ILE (I)215.43%
Histidine HIS (H)41.03%
Lysine LYS (K)256.46%
Methionine MET (M)133.36%
Leucine LEU (L)389.82%
Asparagine ASN (N)215.43%
Glutamine GLN (Q)133.36%
Proline PRO (P)153.88%
Serine SER (S)297.49%
Arginine ARG (R)102.58%
Threonine THR (T)389.82%
Tryptophan TRP (W)20.52%
Valine VAL (V)194.91%
Tyrosine TYR (Y)164.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1906
HydrogenH2992
NitrogenN486
OxygenO593
SulphurS14

FormulaC1906H2992N486O593S14
Total Number of Atoms:5991


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.817,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.817,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.34

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.72, 22.48, 28.94]

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:83.2558
Grand average of hydropathicity (GRAVY):-0.17