Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2843
Number of amino acids:29
Molecular Weight:3072.57 Da
Theoretical pI:7.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.45%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)413.79%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)13.45%
Methionine MET (M)00%
Leucine LEU (L)26.9%
Asparagine ASN (N)13.45%
Glutamine GLN (Q)00%
Proline PRO (P)26.9%
Serine SER (S)26.9%
Arginine ARG (R)13.45%
Threonine THR (T)310.34%
Tryptophan TRP (W)13.45%
Valine VAL (V)26.9%
Tyrosine TYR (Y)26.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC129
HydrogenH199
NitrogenN35
OxygenO40
SulphurS6

FormulaC129H199N35O40S6
Total Number of Atoms:409


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    2.882,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.760,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.14, 31.03, 13.79]

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:50.3448
Grand average of hydropathicity (GRAVY):0.19