Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4498
Number of amino acids:462
Molecular Weight:50792.02 Da
Theoretical pI:6.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.71%
Cysteine CYS (C)40.87%
Glutamic Acid GLU (E)316.71%
Aspartic Acid ASP (D)245.19%
Glycine GLY (G)388.23%
Phynylalanine PHE (F)163.46%
Isoleucine ILE (I)255.41%
Histidine HIS (H)143.03%
Lysine LYS (K)255.41%
Methionine MET (M)81.73%
Leucine LEU (L)5211.26%
Asparagine ASN (N)194.11%
Glutamine GLN (Q)132.81%
Proline PRO (P)316.71%
Serine SER (S)347.36%
Arginine ARG (R)286.06%
Threonine THR (T)234.98%
Tryptophan TRP (W)10.22%
Valine VAL (V)326.93%
Tyrosine TYR (Y)132.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2258
HydrogenH3606
NitrogenN632
OxygenO675
SulphurS12

FormulaC2258H3606N632O675S12
Total Number of Atoms:7183


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25120
Absorption 0.1% (=1 g/l)    0.495,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24870
Absorption 0.1% (=1 g/l)    0.490,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.09, 26.41, 26.41]

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:91.7965
Grand average of hydropathicity (GRAVY):-0.28