Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3275
Number of amino acids:29
Molecular Weight:2922.41 Da
Theoretical pI:4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)517.24%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)413.79%
Phynylalanine PHE (F)13.45%
Isoleucine ILE (I)13.45%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)310.34%
Asparagine ASN (N)26.9%
Glutamine GLN (Q)00%
Proline PRO (P)26.9%
Serine SER (S)413.79%
Arginine ARG (R)00%
Threonine THR (T)13.45%
Tryptophan TRP (W)00%
Valine VAL (V)413.79%
Tyrosine TYR (Y)13.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC124
HydrogenH197
NitrogenN31
OxygenO40
SulphurS5

FormulaC124H197N31O40S5
Total Number of Atoms:397


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):1
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    1740
Absorption 0.1% (=1 g/l)    0.595,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.510,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.48, 41.38, 13.79]

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:93.793
Grand average of hydropathicity (GRAVY):0.95