Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5225
Number of amino acids:229
Molecular Weight:24648.6 Da
Theoretical pI:9.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.42%
Cysteine CYS (C)31.31%
Glutamic Acid GLU (E)10.44%
Aspartic Acid ASP (D)135.68%
Glycine GLY (G)219.17%
Phynylalanine PHE (F)156.55%
Isoleucine ILE (I)177.42%
Histidine HIS (H)62.62%
Lysine LYS (K)114.8%
Methionine MET (M)10.44%
Leucine LEU (L)2310.04%
Asparagine ASN (N)146.11%
Glutamine GLN (Q)83.49%
Proline PRO (P)156.55%
Serine SER (S)135.68%
Arginine ARG (R)83.49%
Threonine THR (T)104.37%
Tryptophan TRP (W)00%
Valine VAL (V)2611.35%
Tyrosine TYR (Y)73.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1132
HydrogenH1776
NitrogenN298
OxygenO310
SulphurS4

FormulaC1132H1776N298O310S4
Total Number of Atoms:3520


Total number of positively charged residues (ARG + LYS):19
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    10555
Absorption 0.1% (=1 g/l)    0.428,   assuming all pairs of CYS residues form cystines

Ext. coefficient    10430
Absorption 0.1% (=1 g/l)    0.423,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[38.43, 27.51, 18.34]

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:108.472
Grand average of hydropathicity (GRAVY):0.32