Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4671
Number of amino acids:498
Molecular Weight:55560.75 Da
Theoretical pI:4.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)438.63%
Cysteine CYS (C)51%
Glutamic Acid GLU (E)408.03%
Aspartic Acid ASP (D)377.43%
Glycine GLY (G)285.62%
Phynylalanine PHE (F)316.22%
Isoleucine ILE (I)336.63%
Histidine HIS (H)91.81%
Lysine LYS (K)448.84%
Methionine MET (M)51%
Leucine LEU (L)326.43%
Asparagine ASN (N)214.22%
Glutamine GLN (Q)183.61%
Proline PRO (P)244.82%
Serine SER (S)377.43%
Arginine ARG (R)112.21%
Threonine THR (T)173.41%
Tryptophan TRP (W)40.8%
Valine VAL (V)408.03%
Tyrosine TYR (Y)193.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2514
HydrogenH3866
NitrogenN636
OxygenO765
SulphurS10

FormulaC2514H3866N636O765S10
Total Number of Atoms:7791


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50560
Absorption 0.1% (=1 g/l)    0.910,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50310
Absorption 0.1% (=1 g/l)    0.905,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.93, 22.09, 24.10]

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:82.8313
Grand average of hydropathicity (GRAVY):-0.30