Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3943
Number of amino acids:93
Molecular Weight:9405.9 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1212.9%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)11.08%
Aspartic Acid ASP (D)33.23%
Glycine GLY (G)1212.9%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)55.38%
Histidine HIS (H)00%
Lysine LYS (K)44.3%
Methionine MET (M)22.15%
Leucine LEU (L)44.3%
Asparagine ASN (N)22.15%
Glutamine GLN (Q)44.3%
Proline PRO (P)77.53%
Serine SER (S)77.53%
Arginine ARG (R)66.45%
Threonine THR (T)66.45%
Tryptophan TRP (W)00%
Valine VAL (V)77.53%
Tyrosine TYR (Y)33.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC395
HydrogenH657
NitrogenN121
OxygenO124
SulphurS10

FormulaC395H657N121O124S10
Total Number of Atoms:1307


Total number of positively charged residues (ARG + LYS):10
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    4970
Absorption 0.1% (=1 g/l)    0.528,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.475,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.43, 30.11, 20.43]

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:72.4731
Grand average of hydropathicity (GRAVY):0.06