Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5281
Number of amino acids:310
Molecular Weight:33805.62 Da
Theoretical pI:10


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.71%
Cysteine CYS (C)92.9%
Glutamic Acid GLU (E)92.9%
Aspartic Acid ASP (D)175.48%
Glycine GLY (G)237.42%
Phynylalanine PHE (F)175.48%
Isoleucine ILE (I)175.48%
Histidine HIS (H)30.97%
Lysine LYS (K)92.9%
Methionine MET (M)61.94%
Leucine LEU (L)268.39%
Asparagine ASN (N)144.52%
Glutamine GLN (Q)92.9%
Proline PRO (P)165.16%
Serine SER (S)3310.65%
Arginine ARG (R)3310.65%
Threonine THR (T)196.13%
Tryptophan TRP (W)00%
Valine VAL (V)196.13%
Tyrosine TYR (Y)41.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1465
HydrogenH2377
NitrogenN447
OxygenO442
SulphurS15

FormulaC1465H2377N447O442S15
Total Number of Atoms:4746


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6460
Absorption 0.1% (=1 g/l)    0.191,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.176,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.77, 27.74, 21.94]

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:80.5806
Grand average of hydropathicity (GRAVY):-0.19