Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5353
Number of amino acids:508
Molecular Weight:54226.21 Da
Theoretical pI:5.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)458.86%
Cysteine CYS (C)122.36%
Glutamic Acid GLU (E)295.71%
Aspartic Acid ASP (D)254.92%
Glycine GLY (G)6011.81%
Phynylalanine PHE (F)214.13%
Isoleucine ILE (I)326.3%
Histidine HIS (H)50.98%
Lysine LYS (K)305.91%
Methionine MET (M)122.36%
Leucine LEU (L)438.46%
Asparagine ASN (N)132.56%
Glutamine GLN (Q)214.13%
Proline PRO (P)265.12%
Serine SER (S)336.5%
Arginine ARG (R)142.76%
Threonine THR (T)254.92%
Tryptophan TRP (W)61.18%
Valine VAL (V)397.68%
Tyrosine TYR (Y)173.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2429
HydrogenH3812
NitrogenN630
OxygenO726
SulphurS24

FormulaC2429H3812N630O726S24
Total Number of Atoms:7621


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    59080
Absorption 0.1% (=1 g/l)    1.090,   assuming all pairs of CYS residues form cystines

Ext. coefficient    58330
Absorption 0.1% (=1 g/l)    1.076,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.10, 25.98, 25.39]

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:88.7008
Grand average of hydropathicity (GRAVY):0.04