Physicochemical Properties of Peptide



PPepDB ID:PPepDB_738
Number of amino acids:144
Molecular Weight:15176.55 Da
Theoretical pI:4.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.64%
Cysteine CYS (C)64.17%
Glutamic Acid GLU (E)128.33%
Aspartic Acid ASP (D)42.78%
Glycine GLY (G)106.94%
Phynylalanine PHE (F)32.08%
Isoleucine ILE (I)149.72%
Histidine HIS (H)10.69%
Lysine LYS (K)106.94%
Methionine MET (M)00%
Leucine LEU (L)1711.81%
Asparagine ASN (N)106.94%
Glutamine GLN (Q)21.39%
Proline PRO (P)64.17%
Serine SER (S)128.33%
Arginine ARG (R)10.69%
Threonine THR (T)117.64%
Tryptophan TRP (W)00%
Valine VAL (V)128.33%
Tyrosine TYR (Y)21.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC670
HydrogenH1109
NitrogenN171
OxygenO214
SulphurS6

FormulaC670H1109N171O214S6
Total Number of Atoms:2170


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):16
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    3355
Absorption 0.1% (=1 g/l)    0.221,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.196,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 26.39, 27.78]

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:115.764
Grand average of hydropathicity (GRAVY):0.30