Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4787
Number of amino acids:65
Molecular Weight:6804.1 Da
Theoretical pI:9.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)812.31%
Cysteine CYS (C)69.23%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)69.23%
Phynylalanine PHE (F)23.08%
Isoleucine ILE (I)46.15%
Histidine HIS (H)00%
Lysine LYS (K)46.15%
Methionine MET (M)34.62%
Leucine LEU (L)57.69%
Asparagine ASN (N)34.62%
Glutamine GLN (Q)23.08%
Proline PRO (P)23.08%
Serine SER (S)913.85%
Arginine ARG (R)23.08%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)57.69%
Tyrosine TYR (Y)46.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC297
HydrogenH480
NitrogenN80
OxygenO84
SulphurS9

FormulaC297H480N80O84S9
Total Number of Atoms:950


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):0
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    6335
Absorption 0.1% (=1 g/l)    0.931,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.876,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.77, 30.77, 24.62]

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:88.6154
Grand average of hydropathicity (GRAVY):0.59