Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5014
Number of amino acids:296
Molecular Weight:34291.07 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)227.43%
Cysteine CYS (C)41.35%
Glutamic Acid GLU (E)103.38%
Aspartic Acid ASP (D)186.08%
Glycine GLY (G)206.76%
Phynylalanine PHE (F)217.09%
Isoleucine ILE (I)134.39%
Histidine HIS (H)62.03%
Lysine LYS (K)175.74%
Methionine MET (M)113.72%
Leucine LEU (L)196.42%
Asparagine ASN (N)155.07%
Glutamine GLN (Q)134.39%
Proline PRO (P)144.73%
Serine SER (S)175.74%
Arginine ARG (R)175.74%
Threonine THR (T)196.42%
Tryptophan TRP (W)124.05%
Valine VAL (V)155.07%
Tyrosine TYR (Y)134.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1562
HydrogenH2324
NitrogenN416
OxygenO430
SulphurS15

FormulaC1562H2324N416O430S15
Total Number of Atoms:4747


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    85620
Absorption 0.1% (=1 g/l)    2.497,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85370
Absorption 0.1% (=1 g/l)    2.490,   assuming all CYS residues are reduced
Aromaticity:0.155

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.29

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.42, 22.30, 20.95]

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:64.2905
Grand average of hydropathicity (GRAVY):-0.41