Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4547
Number of amino acids:214
Molecular Weight:22086.56 Da
Theoretical pI:5.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2813.08%
Cysteine CYS (C)31.4%
Glutamic Acid GLU (E)52.34%
Aspartic Acid ASP (D)94.21%
Glycine GLY (G)2210.28%
Phynylalanine PHE (F)198.88%
Isoleucine ILE (I)136.07%
Histidine HIS (H)31.4%
Lysine LYS (K)94.21%
Methionine MET (M)31.4%
Leucine LEU (L)2210.28%
Asparagine ASN (N)94.21%
Glutamine GLN (Q)104.67%
Proline PRO (P)146.54%
Serine SER (S)136.07%
Arginine ARG (R)10.47%
Threonine THR (T)125.61%
Tryptophan TRP (W)00%
Valine VAL (V)188.41%
Tyrosine TYR (Y)10.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1014
HydrogenH1579
NitrogenN251
OxygenO288
SulphurS6

FormulaC1014H1579N251O288S6
Total Number of Atoms:3138


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):14
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    1615
Absorption 0.1% (=1 g/l)    0.073,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.067,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.11, 27.10, 27.10]

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:101.262
Grand average of hydropathicity (GRAVY):0.55