Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5899
Number of amino acids:261
Molecular Weight:29120.69 Da
Theoretical pI:6.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.75%
Cysteine CYS (C)20.77%
Glutamic Acid GLU (E)114.21%
Aspartic Acid ASP (D)145.36%
Glycine GLY (G)103.83%
Phynylalanine PHE (F)218.05%
Isoleucine ILE (I)134.98%
Histidine HIS (H)62.3%
Lysine LYS (K)166.13%
Methionine MET (M)10.38%
Leucine LEU (L)259.58%
Asparagine ASN (N)2710.34%
Glutamine GLN (Q)93.45%
Proline PRO (P)93.45%
Serine SER (S)2810.73%
Arginine ARG (R)72.68%
Threonine THR (T)207.66%
Tryptophan TRP (W)20.77%
Valine VAL (V)207.66%
Tyrosine TYR (Y)51.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1307
HydrogenH2020
NitrogenN348
OxygenO401
SulphurS3

FormulaC1307H2020N348O401S3
Total Number of Atoms:4079


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18575
Absorption 0.1% (=1 g/l)    0.638,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.634,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.95, 28.35, 19.92]

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:84.7509
Grand average of hydropathicity (GRAVY):-0.23