Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6016
Number of amino acids:83
Molecular Weight:9189.77 Da
Theoretical pI:8.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.41%
Cysteine CYS (C)910.84%
Glutamic Acid GLU (E)33.61%
Aspartic Acid ASP (D)67.23%
Glycine GLY (G)78.43%
Phynylalanine PHE (F)44.82%
Isoleucine ILE (I)67.23%
Histidine HIS (H)11.2%
Lysine LYS (K)910.84%
Methionine MET (M)11.2%
Leucine LEU (L)78.43%
Asparagine ASN (N)22.41%
Glutamine GLN (Q)33.61%
Proline PRO (P)33.61%
Serine SER (S)56.02%
Arginine ARG (R)22.41%
Threonine THR (T)56.02%
Tryptophan TRP (W)00%
Valine VAL (V)56.02%
Tyrosine TYR (Y)33.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC402
HydrogenH645
NitrogenN105
OxygenO120
SulphurS10

FormulaC402H645N105O120S10
Total Number of Atoms:1282


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):9
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    4970
Absorption 0.1% (=1 g/l)    0.541,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.486,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.55

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.12, 20.48, 15.66]

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:80.9639
Grand average of hydropathicity (GRAVY):-0.02