Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4187
Number of amino acids:390
Molecular Weight:43354.45 Da
Theoretical pI:9.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)276.92%
Cysteine CYS (C)82.05%
Glutamic Acid GLU (E)92.31%
Aspartic Acid ASP (D)225.64%
Glycine GLY (G)328.21%
Phynylalanine PHE (F)174.36%
Isoleucine ILE (I)317.95%
Histidine HIS (H)143.59%
Lysine LYS (K)205.13%
Methionine MET (M)71.79%
Leucine LEU (L)215.38%
Asparagine ASN (N)184.62%
Glutamine GLN (Q)61.54%
Proline PRO (P)215.38%
Serine SER (S)3910%
Arginine ARG (R)256.41%
Threonine THR (T)184.62%
Tryptophan TRP (W)82.05%
Valine VAL (V)297.44%
Tyrosine TYR (Y)184.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1947
HydrogenH2999
NitrogenN545
OxygenO552
SulphurS15

FormulaC1947H2999N545O552S15
Total Number of Atoms:6058


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    71320
Absorption 0.1% (=1 g/l)    1.645,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70820
Absorption 0.1% (=1 g/l)    1.634,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.34

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.79, 28.21, 16.41]

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:80.4872
Grand average of hydropathicity (GRAVY):-0.20