Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5898
Number of amino acids:261
Molecular Weight:29266.85 Da
Theoretical pI:6.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.98%
Cysteine CYS (C)20.77%
Glutamic Acid GLU (E)103.83%
Aspartic Acid ASP (D)166.13%
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)20.77%
Leucine LEU (L)238.81%
Asparagine ASN (N)269.96%
Glutamine GLN (Q)83.07%
Proline PRO (P)103.83%
Serine SER (S)2710.34%
Arginine ARG (R)93.45%
Threonine THR (T)228.43%
Tryptophan TRP (W)20.77%
Valine VAL (V)207.66%
Tyrosine TYR (Y)51.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1310
HydrogenH2026
NitrogenN352
OxygenO402
SulphurS4

FormulaC1310H2026N352O402S4
Total Number of Atoms:4094


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):26
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)    0.635,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.630,   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 : 27.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.18, 27.97, 18.39]

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:80.9962
Grand average of hydropathicity (GRAVY):-0.29