Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4768
Number of amino acids:401
Molecular Weight:44406.9 Da
Theoretical pI:8.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.98%
Cysteine CYS (C)102.49%
Glutamic Acid GLU (E)112.74%
Aspartic Acid ASP (D)235.74%
Glycine GLY (G)368.98%
Phynylalanine PHE (F)112.74%
Isoleucine ILE (I)348.48%
Histidine HIS (H)215.24%
Lysine LYS (K)122.99%
Methionine MET (M)112.74%
Leucine LEU (L)225.49%
Asparagine ASN (N)327.98%
Glutamine GLN (Q)102.49%
Proline PRO (P)174.24%
Serine SER (S)379.23%
Arginine ARG (R)266.48%
Threonine THR (T)204.99%
Tryptophan TRP (W)102.49%
Valine VAL (V)194.74%
Tyrosine TYR (Y)112.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1935
HydrogenH2995
NitrogenN585
OxygenO580
SulphurS21

FormulaC1935H2995N585O580S21
Total Number of Atoms:6116


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72015
Absorption 0.1% (=1 g/l)    1.622,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71390
Absorption 0.1% (=1 g/l)    1.608,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.43

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.68, 30.42, 17.96]

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:75.187
Grand average of hydropathicity (GRAVY):-0.40