Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4849
Number of amino acids:222
Molecular Weight:23586.92 Da
Theoretical pI:6.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)209.01%
Cysteine CYS (C)20.9%
Glutamic Acid GLU (E)20.9%
Aspartic Acid ASP (D)125.41%
Glycine GLY (G)188.11%
Phynylalanine PHE (F)188.11%
Isoleucine ILE (I)125.41%
Histidine HIS (H)31.35%
Lysine LYS (K)52.25%
Methionine MET (M)20.9%
Leucine LEU (L)2310.36%
Asparagine ASN (N)229.91%
Glutamine GLN (Q)94.05%
Proline PRO (P)146.31%
Serine SER (S)146.31%
Arginine ARG (R)83.6%
Threonine THR (T)146.31%
Tryptophan TRP (W)00%
Valine VAL (V)2310.36%
Tyrosine TYR (Y)10.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1063
HydrogenH1668
NitrogenN288
OxygenO311
SulphurS4

FormulaC1063H1668N288O311S4
Total Number of Atoms:3334


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):14
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    1615
Absorption 0.1% (=1 g/l)    0.068,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.063,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.68, 30.63, 21.17]

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:100.541
Grand average of hydropathicity (GRAVY):0.26