Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3875
Number of amino acids:93
Molecular Weight:9358.89 Da
Theoretical pI:9.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.6%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)11.08%
Glycine GLY (G)1313.98%
Phynylalanine PHE (F)11.08%
Isoleucine ILE (I)55.38%
Histidine HIS (H)00%
Lysine LYS (K)55.38%
Methionine MET (M)00%
Leucine LEU (L)88.6%
Asparagine ASN (N)55.38%
Glutamine GLN (Q)11.08%
Proline PRO (P)77.53%
Serine SER (S)99.68%
Arginine ARG (R)66.45%
Threonine THR (T)99.68%
Tryptophan TRP (W)00%
Valine VAL (V)55.38%
Tyrosine TYR (Y)22.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC397
HydrogenH668
NitrogenN122
OxygenO122
SulphurS8

FormulaC397H668N122O122S8
Total Number of Atoms:1317


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):1
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)    0.372,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.318,   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 : 34.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.58, 36.56, 17.20]

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:78.7096
Grand average of hydropathicity (GRAVY):0.08