Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2880
Number of amino acids:49
Molecular Weight:5501.12 Da
Theoretical pI:10.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)48.16%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)12.04%
Glycine GLY (G)816.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)24.08%
Histidine HIS (H)12.04%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.04%
Asparagine ASN (N)48.16%
Glutamine GLN (Q)12.04%
Proline PRO (P)36.12%
Serine SER (S)48.16%
Arginine ARG (R)918.37%
Threonine THR (T)12.04%
Tryptophan TRP (W)00%
Valine VAL (V)12.04%
Tyrosine TYR (Y)612.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC230
HydrogenH357
NitrogenN83
OxygenO68
SulphurS4

FormulaC230H357N83O68S4
Total Number of Atoms:742


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9190
Absorption 0.1% (=1 g/l)    1.671,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    1.625,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.41, 38.78, 8.16]

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:35.9184
Grand average of hydropathicity (GRAVY):-1.06