Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2870
Number of amino acids:49
Molecular Weight:5907.56 Da
Theoretical pI:9.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.08%
Cysteine CYS (C)24.08%
Glutamic Acid GLU (E)24.08%
Aspartic Acid ASP (D)48.16%
Glycine GLY (G)12.04%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)24.08%
Histidine HIS (H)24.08%
Lysine LYS (K)24.08%
Methionine MET (M)00%
Leucine LEU (L)36.12%
Asparagine ASN (N)36.12%
Glutamine GLN (Q)24.08%
Proline PRO (P)36.12%
Serine SER (S)612.24%
Arginine ARG (R)918.37%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)24.08%
Tyrosine TYR (Y)48.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC249
HydrogenH399
NitrogenN87
OxygenO77
SulphurS2

FormulaC249H399N87O77S2
Total Number of Atoms:814


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):6
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    6085
Absorption 0.1% (=1 g/l)    1.030,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    1.009,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 76.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.45, 26.53, 14.29]

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:55.7143
Grand average of hydropathicity (GRAVY):-1.45