Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5146
Number of amino acids:222
Molecular Weight:24093.61 Da
Theoretical pI:5.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)188.11%
Cysteine CYS (C)20.9%
Glutamic Acid GLU (E)52.25%
Aspartic Acid ASP (D)146.31%
Glycine GLY (G)156.76%
Phynylalanine PHE (F)167.21%
Isoleucine ILE (I)177.66%
Histidine HIS (H)31.35%
Lysine LYS (K)114.95%
Methionine MET (M)31.35%
Leucine LEU (L)188.11%
Asparagine ASN (N)177.66%
Glutamine GLN (Q)104.5%
Proline PRO (P)146.31%
Serine SER (S)146.31%
Arginine ARG (R)62.7%
Threonine THR (T)125.41%
Tryptophan TRP (W)00%
Valine VAL (V)229.91%
Tyrosine TYR (Y)52.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1093
HydrogenH1710
NitrogenN284
OxygenO319
SulphurS5

FormulaC1093H1710N284O319S5
Total Number of Atoms:3411


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):19
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    7575
Absorption 0.1% (=1 g/l)    0.314,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.309,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.14, 27.03, 19.82]

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:98.3334
Grand average of hydropathicity (GRAVY):0.14