Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5902
Number of amino acids:264
Molecular Weight:28688.49 Da
Theoretical pI:9.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)238.71%
Cysteine CYS (C)145.3%
Glutamic Acid GLU (E)83.03%
Aspartic Acid ASP (D)93.41%
Glycine GLY (G)2910.98%
Phynylalanine PHE (F)124.55%
Isoleucine ILE (I)134.92%
Histidine HIS (H)83.03%
Lysine LYS (K)2810.61%
Methionine MET (M)83.03%
Leucine LEU (L)145.3%
Asparagine ASN (N)83.03%
Glutamine GLN (Q)51.89%
Proline PRO (P)166.06%
Serine SER (S)186.82%
Arginine ARG (R)103.79%
Threonine THR (T)114.17%
Tryptophan TRP (W)41.52%
Valine VAL (V)166.06%
Tyrosine TYR (Y)103.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1280
HydrogenH2005
NitrogenN355
OxygenO351
SulphurS22

FormulaC1280H2005N355O351S22
Total Number of Atoms:4013


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37775
Absorption 0.1% (=1 g/l)    1.317,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36900
Absorption 0.1% (=1 g/l)    1.286,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.14, 26.89, 20.08]

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:66.1742
Grand average of hydropathicity (GRAVY):-0.21