Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4277
Number of amino acids:235
Molecular Weight:25504.85 Da
Theoretical pI:8.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3715.74%
Cysteine CYS (C)31.28%
Glutamic Acid GLU (E)10.43%
Aspartic Acid ASP (D)00%
Glycine GLY (G)52.13%
Phynylalanine PHE (F)145.96%
Isoleucine ILE (I)104.26%
Histidine HIS (H)20.85%
Lysine LYS (K)10.43%
Methionine MET (M)20.85%
Leucine LEU (L)4820.43%
Asparagine ASN (N)104.26%
Glutamine GLN (Q)4117.45%
Proline PRO (P)218.94%
Serine SER (S)166.81%
Arginine ARG (R)20.85%
Threonine THR (T)62.55%
Tryptophan TRP (W)00%
Valine VAL (V)83.4%
Tyrosine TYR (Y)83.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1183
HydrogenH1857
NitrogenN297
OxygenO319
SulphurS5

FormulaC1183H1857N297O319S5
Total Number of Atoms:3661


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):1
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    12045
Absorption 0.1% (=1 g/l)    0.472,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.467,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 73.72

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.45, 22.13, 37.45]

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:121.872
Grand average of hydropathicity (GRAVY):0.48