Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1154
Number of amino acids:233
Molecular Weight:24041.69 Da
Theoretical pI:4.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2410.3%
Cysteine CYS (C)166.87%
Glutamic Acid GLU (E)52.15%
Aspartic Acid ASP (D)83.43%
Glycine GLY (G)2611.16%
Phynylalanine PHE (F)93.86%
Isoleucine ILE (I)73%
Histidine HIS (H)00%
Lysine LYS (K)20.86%
Methionine MET (M)20.86%
Leucine LEU (L)156.44%
Asparagine ASN (N)177.3%
Glutamine GLN (Q)135.58%
Proline PRO (P)135.58%
Serine SER (S)208.58%
Arginine ARG (R)31.29%
Threonine THR (T)2611.16%
Tryptophan TRP (W)31.29%
Valine VAL (V)146.01%
Tyrosine TYR (Y)104.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1037
HydrogenH1581
NitrogenN277
OxygenO346
SulphurS18

FormulaC1037H1581N277O346S18
Total Number of Atoms:3259


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.348,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.306,   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 : 34.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.89, 32.62, 19.74]

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:64.5493
Grand average of hydropathicity (GRAVY):0.03