Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4609
Number of amino acids:642
Molecular Weight:70744.95 Da
Theoretical pI:8.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)243.74%
Cysteine CYS (C)264.05%
Glutamic Acid GLU (E)385.92%
Aspartic Acid ASP (D)223.43%
Glycine GLY (G)589.03%
Phynylalanine PHE (F)223.43%
Isoleucine ILE (I)416.39%
Histidine HIS (H)111.71%
Lysine LYS (K)416.39%
Methionine MET (M)152.34%
Leucine LEU (L)538.26%
Asparagine ASN (N)365.61%
Glutamine GLN (Q)142.18%
Proline PRO (P)253.89%
Serine SER (S)6610.28%
Arginine ARG (R)304.67%
Threonine THR (T)416.39%
Tryptophan TRP (W)30.47%
Valine VAL (V)457.01%
Tyrosine TYR (Y)314.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3111
HydrogenH4932
NitrogenN848
OxygenO951
SulphurS41

FormulaC3111H4932N848O951S41
Total Number of Atoms:9883


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):60
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    64315
Absorption 0.1% (=1 g/l)    0.909,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62690
Absorption 0.1% (=1 g/l)    0.886,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.37, 28.82, 20.25]

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:81.1682
Grand average of hydropathicity (GRAVY):-0.20