Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5618
Number of amino acids:83
Molecular Weight:8574.55 Da
Theoretical pI:4.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1922.89%
Cysteine CYS (C)22.41%
Glutamic Acid GLU (E)89.64%
Aspartic Acid ASP (D)22.41%
Glycine GLY (G)67.23%
Phynylalanine PHE (F)11.2%
Isoleucine ILE (I)33.61%
Histidine HIS (H)33.61%
Lysine LYS (K)11.2%
Methionine MET (M)22.41%
Leucine LEU (L)67.23%
Asparagine ASN (N)11.2%
Glutamine GLN (Q)44.82%
Proline PRO (P)22.41%
Serine SER (S)44.82%
Arginine ARG (R)44.82%
Threonine THR (T)910.84%
Tryptophan TRP (W)00%
Valine VAL (V)44.82%
Tyrosine TYR (Y)22.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC364
HydrogenH587
NitrogenN107
OxygenO124
SulphurS4

FormulaC364H587N107O124S4
Total Number of Atoms:1186


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):10
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    3105
Absorption 0.1% (=1 g/l)    0.362,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.348,   assuming all CYS residues are reduced
Aromaticity:0.036

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.20

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.28, 15.66, 42.17]

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:79.1567
Grand average of hydropathicity (GRAVY):-0.03