Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2252
Number of amino acids:82
Molecular Weight:9304.11 Da
Theoretical pI:8.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.44%
Cysteine CYS (C)89.76%
Glutamic Acid GLU (E)44.88%
Aspartic Acid ASP (D)22.44%
Glycine GLY (G)56.1%
Phynylalanine PHE (F)56.1%
Isoleucine ILE (I)44.88%
Histidine HIS (H)00%
Lysine LYS (K)78.54%
Methionine MET (M)56.1%
Leucine LEU (L)89.76%
Asparagine ASN (N)22.44%
Glutamine GLN (Q)44.88%
Proline PRO (P)44.88%
Serine SER (S)78.54%
Arginine ARG (R)44.88%
Threonine THR (T)67.32%
Tryptophan TRP (W)22.44%
Valine VAL (V)33.66%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC406
HydrogenH655
NitrogenN109
OxygenO114
SulphurS13

FormulaC406H655N109O114S13
Total Number of Atoms:1297


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11500
Absorption 0.1% (=1 g/l)    1.236,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    1.182,   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 : 27.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.83, 21.95, 23.17]

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:70.122
Grand average of hydropathicity (GRAVY):0.01