Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3885
Number of amino acids:94
Molecular Weight:9883.36 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)55.32%
Cysteine CYS (C)88.51%
Glutamic Acid GLU (E)11.06%
Aspartic Acid ASP (D)55.32%
Glycine GLY (G)77.45%
Phynylalanine PHE (F)11.06%
Isoleucine ILE (I)55.32%
Histidine HIS (H)00%
Lysine LYS (K)44.26%
Methionine MET (M)00%
Leucine LEU (L)1010.64%
Asparagine ASN (N)33.19%
Glutamine GLN (Q)66.38%
Proline PRO (P)77.45%
Serine SER (S)1010.64%
Arginine ARG (R)33.19%
Threonine THR (T)99.57%
Tryptophan TRP (W)00%
Valine VAL (V)77.45%
Tyrosine TYR (Y)33.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC424
HydrogenH696
NitrogenN116
OxygenO138
SulphurS8

FormulaC424H696N116O138S8
Total Number of Atoms:1382


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):6
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)    0.503,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.452,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.66, 28.72, 17.02]

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:89.149
Grand average of hydropathicity (GRAVY):0.08