Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1101
Number of amino acids:133
Molecular Weight:13961.14 Da
Theoretical pI:7.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)129.02%
Cysteine CYS (C)139.77%
Glutamic Acid GLU (E)53.76%
Aspartic Acid ASP (D)32.26%
Glycine GLY (G)118.27%
Phynylalanine PHE (F)10.75%
Isoleucine ILE (I)86.02%
Histidine HIS (H)10.75%
Lysine LYS (K)75.26%
Methionine MET (M)53.76%
Leucine LEU (L)86.02%
Asparagine ASN (N)118.27%
Glutamine GLN (Q)53.76%
Proline PRO (P)32.26%
Serine SER (S)107.52%
Arginine ARG (R)32.26%
Threonine THR (T)129.02%
Tryptophan TRP (W)00%
Valine VAL (V)118.27%
Tyrosine TYR (Y)43.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC583
HydrogenH963
NitrogenN167
OxygenO192
SulphurS18

FormulaC583H963N167O192S18
Total Number of Atoms:1923


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):8
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    6710
Absorption 0.1% (=1 g/l)    0.481,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.427,   assuming all CYS residues are reduced
Aromaticity:0.038

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.06, 26.32, 22.56]

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:79.9248
Grand average of hydropathicity (GRAVY):0.15