Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4992
Number of amino acids:620
Molecular Weight:69202.42 Da
Theoretical pI:8.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)325.16%
Cysteine CYS (C)213.39%
Glutamic Acid GLU (E)325.16%
Aspartic Acid ASP (D)274.35%
Glycine GLY (G)416.61%
Phynylalanine PHE (F)335.32%
Isoleucine ILE (I)386.13%
Histidine HIS (H)172.74%
Lysine LYS (K)386.13%
Methionine MET (M)101.61%
Leucine LEU (L)589.35%
Asparagine ASN (N)335.32%
Glutamine GLN (Q)213.39%
Proline PRO (P)254.03%
Serine SER (S)589.35%
Arginine ARG (R)335.32%
Threonine THR (T)345.48%
Tryptophan TRP (W)40.65%
Valine VAL (V)467.42%
Tyrosine TYR (Y)193.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3077
HydrogenH4857
NitrogenN849
OxygenO904
SulphurS31

FormulaC3077H4857N849O904S31
Total Number of Atoms:9718


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):59
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51560
Absorption 0.1% (=1 g/l)    0.745,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50310
Absorption 0.1% (=1 g/l)    0.727,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.94, 25.32, 21.29]

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:87.0645
Grand average of hydropathicity (GRAVY):-0.15