Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2135
Number of amino acids:26
Molecular Weight:3337.72 Da
Theoretical pI:8.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)415.38%
Glutamic Acid GLU (E)13.85%
Aspartic Acid ASP (D)311.54%
Glycine GLY (G)00%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)311.54%
Lysine LYS (K)13.85%
Methionine MET (M)13.85%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)519.23%
Proline PRO (P)13.85%
Serine SER (S)13.85%
Arginine ARG (R)623.08%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC127
HydrogenH210
NitrogenN56
OxygenO41
SulphurS5

FormulaC127H210N56O41S5
Total Number of Atoms:439


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):4
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    250
Absorption 0.1% (=1 g/l)    0.075,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.000

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 79.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[0.00, 7.69, 7.69]

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:0
Grand average of hydropathicity (GRAVY):-2.40