Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1489
Number of amino acids:96
Molecular Weight:10296.67 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.08%
Cysteine CYS (C)1919.79%
Glutamic Acid GLU (E)44.17%
Aspartic Acid ASP (D)77.29%
Glycine GLY (G)1313.54%
Phynylalanine PHE (F)11.04%
Isoleucine ILE (I)11.04%
Histidine HIS (H)22.08%
Lysine LYS (K)55.21%
Methionine MET (M)11.04%
Leucine LEU (L)99.38%
Asparagine ASN (N)77.29%
Glutamine GLN (Q)33.13%
Proline PRO (P)44.17%
Serine SER (S)55.21%
Arginine ARG (R)44.17%
Threonine THR (T)44.17%
Tryptophan TRP (W)00%
Valine VAL (V)11.04%
Tyrosine TYR (Y)44.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC412
HydrogenH651
NitrogenN127
OxygenO142
SulphurS20

FormulaC412H651N127O142S20
Total Number of Atoms:1352


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):11
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    7085
Absorption 0.1% (=1 g/l)    0.688,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.579,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.67, 30.21, 16.67]

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:45.7292
Grand average of hydropathicity (GRAVY):-0.44