Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4572
Number of amino acids:636
Molecular Weight:70097.02 Da
Theoretical pI:5.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)436.76%
Cysteine CYS (C)50.79%
Glutamic Acid GLU (E)213.3%
Aspartic Acid ASP (D)467.23%
Glycine GLY (G)558.65%
Phynylalanine PHE (F)233.62%
Isoleucine ILE (I)325.03%
Histidine HIS (H)152.36%
Lysine LYS (K)335.19%
Methionine MET (M)81.26%
Leucine LEU (L)578.96%
Asparagine ASN (N)243.77%
Glutamine GLN (Q)284.4%
Proline PRO (P)396.13%
Serine SER (S)558.65%
Arginine ARG (R)203.14%
Threonine THR (T)385.97%
Tryptophan TRP (W)192.99%
Valine VAL (V)487.55%
Tyrosine TYR (Y)274.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3172
HydrogenH4830
NitrogenN830
OxygenO943
SulphurS13

FormulaC3172H4830N830O943S13
Total Number of Atoms:9788


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    144980
Absorption 0.1% (=1 g/l)    2.068,   assuming all pairs of CYS residues form cystines

Ext. coefficient    144730
Absorption 0.1% (=1 g/l)    2.065,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.41

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.39, 27.20, 20.28]

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:83.2233
Grand average of hydropathicity (GRAVY):-0.25