Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2600
Number of amino acids:47
Molecular Weight:5403.07 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.13%
Cysteine CYS (C)817.02%
Glutamic Acid GLU (E)24.26%
Aspartic Acid ASP (D)510.64%
Glycine GLY (G)48.51%
Phynylalanine PHE (F)24.26%
Isoleucine ILE (I)00%
Histidine HIS (H)24.26%
Lysine LYS (K)48.51%
Methionine MET (M)00%
Leucine LEU (L)36.38%
Asparagine ASN (N)36.38%
Glutamine GLN (Q)00%
Proline PRO (P)12.13%
Serine SER (S)12.13%
Arginine ARG (R)48.51%
Threonine THR (T)510.64%
Tryptophan TRP (W)12.13%
Valine VAL (V)00%
Tyrosine TYR (Y)12.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC221
HydrogenH343
NitrogenN71
OxygenO72
SulphurS8

FormulaC221H343N71O72S8
Total Number of Atoms:715


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    1.386,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.294,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.11

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.89, 19.15, 12.77]

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:27.0213
Grand average of hydropathicity (GRAVY):-0.98