Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6170
Number of amino acids:91
Molecular Weight:9282.9 Da
Theoretical pI:5.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1617.58%
Cysteine CYS (C)88.79%
Glutamic Acid GLU (E)11.1%
Aspartic Acid ASP (D)33.3%
Glycine GLY (G)33.3%
Phynylalanine PHE (F)22.2%
Isoleucine ILE (I)22.2%
Histidine HIS (H)00%
Lysine LYS (K)22.2%
Methionine MET (M)22.2%
Leucine LEU (L)1516.48%
Asparagine ASN (N)77.69%
Glutamine GLN (Q)44.4%
Proline PRO (P)55.49%
Serine SER (S)77.69%
Arginine ARG (R)22.2%
Threonine THR (T)66.59%
Tryptophan TRP (W)00%
Valine VAL (V)66.59%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC397
HydrogenH664
NitrogenN110
OxygenO124
SulphurS10

FormulaC397H664N110O124S10
Total Number of Atoms:1305


Total number of positively charged residues (ARG + LYS):4
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    500
Absorption 0.1% (=1 g/l)    0.054,   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:0.022

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.47, 24.18, 37.36]

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:109.56
Grand average of hydropathicity (GRAVY):0.67