Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4487
Number of amino acids:370
Molecular Weight:40599.19 Da
Theoretical pI:9.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)359.46%
Cysteine CYS (C)10.27%
Glutamic Acid GLU (E)112.97%
Aspartic Acid ASP (D)133.51%
Glycine GLY (G)246.49%
Phynylalanine PHE (F)164.32%
Isoleucine ILE (I)246.49%
Histidine HIS (H)41.08%
Lysine LYS (K)123.24%
Methionine MET (M)102.7%
Leucine LEU (L)318.38%
Asparagine ASN (N)359.46%
Glutamine GLN (Q)133.51%
Proline PRO (P)236.22%
Serine SER (S)3810.27%
Arginine ARG (R)215.68%
Threonine THR (T)123.24%
Tryptophan TRP (W)41.08%
Valine VAL (V)277.3%
Tyrosine TYR (Y)164.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1814
HydrogenH2835
NitrogenN505
OxygenO533
SulphurS11

FormulaC1814H2835N505O533S11
Total Number of Atoms:5698


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45840
Absorption 0.1% (=1 g/l)    1.129,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45840
Absorption 0.1% (=1 g/l)    1.129,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.89, 32.43, 23.51]

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:88.5946
Grand average of hydropathicity (GRAVY):-0.13