Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1009
Number of amino acids:255
Molecular Weight:27041.28 Da
Theoretical pI:4.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.63%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)155.88%
Glycine GLY (G)2710.59%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)124.71%
Histidine HIS (H)20.78%
Lysine LYS (K)103.92%
Methionine MET (M)20.78%
Leucine LEU (L)197.45%
Asparagine ASN (N)114.31%
Glutamine GLN (Q)62.35%
Proline PRO (P)155.88%
Serine SER (S)2610.2%
Arginine ARG (R)72.75%
Threonine THR (T)249.41%
Tryptophan TRP (W)41.57%
Valine VAL (V)62.35%
Tyrosine TYR (Y)114.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1186
HydrogenH1801
NitrogenN311
OxygenO378
SulphurS18

FormulaC1186H1801N311O378S18
Total Number of Atoms:3694


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39390
Absorption 0.1% (=1 g/l)    1.457,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    1.420,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.49, 30.98, 19.61]

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:62.8627
Grand average of hydropathicity (GRAVY):-0.13