Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5177
Number of amino acids:504
Molecular Weight:57043.49 Da
Theoretical pI:6.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)224.37%
Cysteine CYS (C)61.19%
Glutamic Acid GLU (E)428.33%
Aspartic Acid ASP (D)275.36%
Glycine GLY (G)438.53%
Phynylalanine PHE (F)244.76%
Isoleucine ILE (I)244.76%
Histidine HIS (H)122.38%
Lysine LYS (K)163.17%
Methionine MET (M)20.4%
Leucine LEU (L)387.54%
Asparagine ASN (N)234.56%
Glutamine GLN (Q)387.54%
Proline PRO (P)214.17%
Serine SER (S)438.53%
Arginine ARG (R)479.33%
Threonine THR (T)193.77%
Tryptophan TRP (W)61.19%
Valine VAL (V)418.13%
Tyrosine TYR (Y)101.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2489
HydrogenH3912
NitrogenN752
OxygenO776
SulphurS8

FormulaC2489H3912N752O776S8
Total Number of Atoms:7937


Total number of positively charged residues (ARG + LYS):63
Total number of negatively charged residues (ASP + GLU):69
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48275
Absorption 0.1% (=1 g/l)    0.846,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    0.840,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.37, 25.79, 20.63]

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:75.9325
Grand average of hydropathicity (GRAVY):-0.66