Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3868
Number of amino acids:93
Molecular Weight:9054.16 Da
Theoretical pI:9.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1718.28%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)22.15%
Glycine GLY (G)1010.75%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)66.45%
Histidine HIS (H)00%
Lysine LYS (K)22.15%
Methionine MET (M)00%
Leucine LEU (L)33.23%
Asparagine ASN (N)77.53%
Glutamine GLN (Q)22.15%
Proline PRO (P)44.3%
Serine SER (S)1415.05%
Arginine ARG (R)66.45%
Threonine THR (T)55.38%
Tryptophan TRP (W)00%
Valine VAL (V)55.38%
Tyrosine TYR (Y)22.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC368
HydrogenH616
NitrogenN122
OxygenO128
SulphurS8

FormulaC368H616N122O128S8
Total Number of Atoms:1242


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):2
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    3480
Absorption 0.1% (=1 g/l)    0.384,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.329,   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 : 33.98

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.20, 37.63, 21.51]

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:71.6129
Grand average of hydropathicity (GRAVY):0.10