Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1607
Number of amino acids:44
Molecular Weight:4864.5 Da
Theoretical pI:9.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.82%
Cysteine CYS (C)511.36%
Glutamic Acid GLU (E)24.55%
Aspartic Acid ASP (D)00%
Glycine GLY (G)49.09%
Phynylalanine PHE (F)12.27%
Isoleucine ILE (I)12.27%
Histidine HIS (H)24.55%
Lysine LYS (K)49.09%
Methionine MET (M)00%
Leucine LEU (L)24.55%
Asparagine ASN (N)613.64%
Glutamine GLN (Q)24.55%
Proline PRO (P)24.55%
Serine SER (S)36.82%
Arginine ARG (R)24.55%
Threonine THR (T)12.27%
Tryptophan TRP (W)12.27%
Valine VAL (V)24.55%
Tyrosine TYR (Y)12.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC204
HydrogenH321
NitrogenN67
OxygenO62
SulphurS5

FormulaC204H321N67O62S5
Total Number of Atoms:659


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7240
Absorption 0.1% (=1 g/l)    1.488,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.437,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.18, 34.09, 15.91]

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:46.5909
Grand average of hydropathicity (GRAVY):-0.79