Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5512
Number of amino acids:89
Molecular Weight:10192.12 Da
Theoretical pI:8.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.37%
Cysteine CYS (C)88.99%
Glutamic Acid GLU (E)44.49%
Aspartic Acid ASP (D)66.74%
Glycine GLY (G)66.74%
Phynylalanine PHE (F)1112.36%
Isoleucine ILE (I)44.49%
Histidine HIS (H)22.25%
Lysine LYS (K)1314.61%
Methionine MET (M)11.12%
Leucine LEU (L)55.62%
Asparagine ASN (N)22.25%
Glutamine GLN (Q)22.25%
Proline PRO (P)55.62%
Serine SER (S)22.25%
Arginine ARG (R)22.25%
Threonine THR (T)22.25%
Tryptophan TRP (W)00%
Valine VAL (V)910.11%
Tyrosine TYR (Y)22.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC469
HydrogenH720
NitrogenN116
OxygenO120
SulphurS9

FormulaC469H720N116O120S9
Total Number of Atoms:1434


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):10
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    3480
Absorption 0.1% (=1 g/l)    0.341,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.292,   assuming all CYS residues are reduced
Aromaticity:0.146

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.83, 16.85, 14.61]

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:72.135
Grand average of hydropathicity (GRAVY):0.02