Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2503
Number of amino acids:49
Molecular Weight:5582.19 Da
Theoretical pI:4.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)816.33%
Glutamic Acid GLU (E)24.08%
Aspartic Acid ASP (D)714.29%
Glycine GLY (G)48.16%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.04%
Histidine HIS (H)36.12%
Lysine LYS (K)36.12%
Methionine MET (M)00%
Leucine LEU (L)36.12%
Asparagine ASN (N)12.04%
Glutamine GLN (Q)00%
Proline PRO (P)48.16%
Serine SER (S)00%
Arginine ARG (R)24.08%
Threonine THR (T)714.29%
Tryptophan TRP (W)12.04%
Valine VAL (V)00%
Tyrosine TYR (Y)36.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC232
HydrogenH348
NitrogenN66
OxygenO79
SulphurS8

FormulaC232H348N66O79S8
Total Number of Atoms:733


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    1.876,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.786,   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 : 36.56

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.33, 18.37, 10.20]

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:31.8368
Grand average of hydropathicity (GRAVY):-0.96